Zack Kelly Stats: Statcast, Visuals & Advanced Metrics

Zack Kelly

P | Bats/Throws: R/R | 6' 3" 231LBS | Age: 30

	W	L	ERA	G	GS	IP	SO	WHIP
2023	0	0	3.86	8	0	9.1	6	1.61
2024	6	3	3.97	49	3	56.2	61	1.25
2025	1	1	9.00	7	0	10	11	1.40
4 Seasons	8	4	4.52	77	3	89.2	89	1.32

	G	W-L	ERA	IP	SO	WHIP
2023	8	0-0	3.86	9.1	6	1.61
2024	49	6-3	3.97	56.2	61	1.25
2025	7	1-1	9.00	10	11	1.40
4 Seasons	77	8-4	4.52	89.2	89	1.32

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Statcast Standard Splits Game Logs

Standard MLB Batting Statistics

No MLB Hitting Statistics.

Standard MLB Pitching Statistics

Season	Tm	LG	BF	W	L	ERA	G	GS	IP	H	R	ER	HR	BB	SO	WHIP
2022	BOS	AL	59	1	0	3.95	13	0	13.2	14	6	6	2	4	11	1.32
2023	BOS	AL	43	0	0	3.86	8	0	9.1	7	4	4	0	8	6	1.61
2024	BOS	AL	241	6	3	3.97	49	3	56.2	44	31	25	10	27	61	1.25
2025	BOS	AL	45	1	1	9.00	7	0	10.0	12	10	10	1	2	11	1.40
4 Seasons	BOS	AL	388	8	4	4.52	77	3	89.2	77	51	45	13	41	89	1.32

*: All Star Season, Rankings AL/NL: Top 5 10 15 20, Click for Chart.

Standard MLB Fielding Statistics

Season	Tm	LG	POS	G	GS	INN	TC	PO	A	DP	FPCT%
2022	BOS	AL	P	13	0	13.2	3	1	2	0	1.000
2023	BOS	AL	P	8	0	9.1	2	1	1	1	1.000
2024	BOS	AL	P	49	3	56.2	18	9	9	0	1.000
2025	BOS	AL	P	7	0	10.0	2	1	1	0	1.000
4 Seasons	BOS	AL	P	77	3	89.2	25	12	13	1	1.000

Spray Chart

Standard Minor League Batting Statistics

No Minor League Hitting Statistics.

Standard Minor League Pitching Statistics

Season	Tm	LG	L	W	L	ERA	G	GS	SV	IP	H	R	ER	HR	BB	SO	WHIP
2017	AZL Athletics	AZL	ROK	1	0	3.77	13	0	1	28.2	28	16	12	1	6	23	1.19
2018	3 Teams		Minors	5	3	2.93	18	0	1	43.0	40	16	14	3	16	41	1.30
2018	Orem Owlz	PIO	ROK	1	0	1.13	2	0	0	8.0	5	2	1	0	2	9	0.88
2018	Burlington Bees	MID	A(Full)	3	3	2.86	12	0	0	28.1	26	10	9	3	12	25	1.34
2018	Inland Empire 66ers	CAL	A(Adv)	1	0	5.40	4	0	1	6.2	9	4	4	0	2	7	1.65
2019	2 Teams		Minors	3	7	3.63	21	13	0	79.1	81	43	32	5	29	85	1.39
2019	Inland Empire 66ers	CAL	A(Adv)	0	1	0.00	1	0	0	4.0	4	1	0	0	0	2	1.00
2019	Mobile BayBears	SOU	AA	3	6	3.82	20	13	0	75.1	77	42	32	5	29	83	1.41
2021	2 Teams		Minors	4	1	2.18	36	0	6	45.1	31	12	11	2	18	69	1.08
2021	Portland Sea Dogs	AA NE	AA	3	1	1.69	21	0	5	26.2	18	6	5	1	13	40	1.16
2021	Worcester Red Sox	AAA E	AAA	1	0	2.89	15	0	1	18.2	13	6	6	1	5	29	0.96
2022	Worcester Red Sox	INT	AAA	6	3	2.72	44	0	3	49.2	34	23	15	2	25	72	1.19
2023	4 Teams		Minors	0	3	12.00	7	3	0	6.0	7	8	8	3	6	7	2.17
2023	Salem Red Sox	CAR	A	0	2	27.00	2	1	0	1.0	3	3	3	0	4	1	7.00
2023	Greenville Drive	SAL	A+	0	0	0.00	1	1	0	1.0	0	0	0	0	1	2	1.00
2023	Portland Sea Dogs	EAS	AA	0	0	4.50	1	1	0	2.0	1	1	1	1	0	1	0.50
2023	Worcester Red Sox	INT	AAA	0	1	18.00	3	0	0	2.0	3	4	4	2	1	3	2.00
2024	Worcester Red Sox	INT	AAA	0	0	0.00	9	0	1	12.2	1	0	0	0	8	13	0.71
2025	Worcester Red Sox	INT	AAA	0	1	12.86	6	1	0	7.0	6	10	10	2	12	9	2.57
	2 Teams		ROK	2	0	3.19	15	0	1	36.2	33	18	13	1	8	32	1.12
	Worcester Red Sox	INT	AAA	7	5	3.50	77	1	5	90.0	57	43	35	7	51	126	1.20
	2 Teams		AA	6	7	3.29	42	14	5	104.0	96	49	38	7	42	124	1.33
	2 Teams		A+	1	1	3.09	6	1	1	11.2	13	5	4	0	3	11	1.37
	2 Teams		A	3	5	3.68	14	1	0	29.1	29	13	12	3	16	26	1.53
Career Minors	9 Teams			19	18	3.38	154	17	12	271.2	228	128	102	18	120	319	1.28

Standard Minor League Fielding Statistics

Season	Tm	LG	L	POS	G	GS	INN	TC	PO	A	E	FPCT%
2017	AZL Athletics	AZL	ROK	P	13	0	28.2	7	3	4	0	1.000
2018	3 Teams		Minors	P	18	0	43.0	5	0	5	0	1.000
2018	Orem Owlz	PIO	ROK	P	2	0	8.0	1	0	1	0	1.000
2018	Burlington Bees	MID	A(Full)	P	12	0	28.1	4	0	4	0	1.000
2018	Inland Empire 66ers	CAL	A(Adv)	P	4	0	6.2	0	0	0	0	.000
2019	2 Teams		Minors	P	21	13	79.1	12	2	9	1	.917
2019	Inland Empire 66ers	CAL	A(Adv)	P	1	0	4.0	1	1	0	0	1.000
2019	Mobile BayBears	SOU	AA	P	20	13	75.1	11	1	9	1	.909
2021	2 Teams		Minors	P	36	0	45.1	6	1	5	0	1.000
2021	Portland Sea Dogs	AA NE	AA	P	21	0	26.2	4	0	4	0	1.000
2021	Worcester Red Sox	AAA E	AAA	P	15	0	18.2	2	1	1	0	1.000
2022	Worcester Red Sox	INT	AAA	P	44	0	49.2	3	0	2	1	.667
2023	4 Teams		Minors	P	7	3	6.0	2	0	2	0	1.000
2023	Salem Red Sox	CAR	A	P	2	1	1.0	0	0	0	0	.000
2023	Greenville Drive	SAL	A+	P	1	1	1.0	0	0	0	0	.000
2023	Portland Sea Dogs	EAS	AA	P	1	1	2.0	1	0	1	0	1.000
2023	Worcester Red Sox	INT	AAA	P	3	0	2.0	1	0	1	0	1.000
2024	Worcester Red Sox	INT	AAA	P	9	0	12.2	4	3	1	0	1.000
2025	Worcester Red Sox	INT	AAA	P	6	1	7.0	1	0	1	0	1.000
	2 Teams		ROK	P	15	0	36.2	8	3	5	0	1.000
	Worcester Red Sox	INT	AAA	P	77	1	90.0	11	4	6	1	.909
	2 Teams		AA	P	42	14	104.0	16	1	14	1	.938
	2 Teams		A+	P	6	1	11.2	1	1	0	0	1.000
	2 Teams		A	P	14	1	29.1	4	0	4	0	1.000
Career Minors	9 Teams			P	154	17	271.2	40	9	29	2	.950

Rankings

Hit By Pitch

Year	HBP	Rank
2025	2	18th in AL

Transactions

Team	Date	Transaction
	04/22/2025	Boston Red Sox optioned RHP Zack Kelly to Worcester Red Sox.
	04/16/2025	RHP Zack Kelly changed number to 76.
	04/15/2025	RHP Zack Kelly changed number to 42.
	10/01/2024	Boston Red Sox recalled RHP Zack Kelly from Worcester Red Sox.
	09/14/2024	Boston Red Sox optioned RHP Zack Kelly to Worcester Red Sox.
	06/05/2024	Boston Red Sox recalled RHP Zack Kelly from Worcester Red Sox.
	05/26/2024	Boston Red Sox optioned RHP Zack Kelly to Worcester Red Sox.
	05/26/2024	Worcester Red Sox activated RHP Zack Kelly.
	04/24/2024	Boston Red Sox recalled RHP Zack Kelly from Worcester Red Sox.
	03/22/2024	Boston Red Sox optioned RHP Zack Kelly to Worcester Red Sox.
	09/24/2023	Boston Red Sox activated RHP Zack Kelly from the 60-day injured list.
	09/16/2023	Boston Red Sox sent RHP Zack Kelly on a rehab assignment to Worcester Red Sox.
	09/13/2023	Boston Red Sox sent RHP Zack Kelly on a rehab assignment to Portland Sea Dogs.
	09/05/2023	Boston Red Sox sent RHP Zack Kelly on a rehab assignment to Salem Red Sox.
	09/01/2023	Boston Red Sox sent RHP Zack Kelly on a rehab assignment to Greenville Drive.
	04/16/2023	Boston Red Sox transferred RHP Zack Kelly from the 15-day injured list to the 60-day injured list. Right elbow inflammation.
	04/13/2023	Boston Red Sox placed RHP Zack Kelly on the 15-day injured list. Right elbow inflammation.
	09/05/2022	Boston Red Sox activated RHP Zack Kelly from the paternity list.
	09/02/2022	Boston Red Sox placed RHP Zack Kelly on the paternity list.
	08/29/2022	Boston Red Sox selected the contract of RHP Zack Kelly from Worcester Red Sox.
	12/21/2021	Boston Red Sox invited non-roster RHP Zack Kelly to spring training.
	12/21/2021	RHP Zack Kelly roster status changed by Boston Red Sox.
	07/29/2021	RHP Zack Kelly assigned to Worcester Red Sox from Portland Sea Dogs.
	01/05/2021	RHP Zack Kelly assigned to Portland Sea Dogs.
	01/04/2021	Boston Red Sox signed free agent RHP Zack Kelly to a minor league contract.
	05/29/2020	Inland Empire 66ers released RHP Zack Kelly.
	11/20/2019	RHP Zack Kelly assigned to Inland Empire 66ers from Rocket City Trash Pandas.
	09/11/2019	Zack Kelly roster status changed by Mobile BayBears.
	08/30/2019	Mobile BayBears placed RHP Zack Kelly on the 7-day injured list.
	08/05/2019	RHP Zack Kelly assigned to Mobile BayBears from Inland Empire 66ers.
	07/31/2019	Inland Empire 66ers placed RHP Zack Kelly on the 7-day injured list.
	07/28/2019	RHP Zack Kelly assigned to Inland Empire 66ers from Orem Owlz.
	07/25/2019	RHP Zack Kelly assigned to Orem Owlz from Salt Lake Bees.
	07/24/2019	RHP Zack Kelly assigned to Salt Lake Bees from Mobile BayBears.
	06/21/2019	RHP Zack Kelly assigned to Mobile BayBears from Inland Empire 66ers.
	06/20/2019	RHP Zack Kelly assigned to Inland Empire 66ers from Mobile BayBears.
	06/16/2019	RHP Zack Kelly assigned to Mobile BayBears from Angels Extended Spring Training.
	06/12/2019	RHP Zack Kelly assigned to Angels Extended Spring Training from Mobile BayBears.
	06/11/2019	Mobile BayBears activated RHP Zack Kelly from the 7-day injured list.
	06/04/2019	Mobile BayBears placed RHP Zack Kelly on the 7-day injured list.
	06/01/2019	RHP Zack Kelly assigned to Mobile BayBears from Angels Extended Spring Training.
	05/29/2019	RHP Zack Kelly assigned to Angels Extended Spring Training from Mobile BayBears.
	05/18/2019	Mobile BayBears activated RHP Zack Kelly from the 7-day injured list.
	05/09/2019	Mobile BayBears placed RHP Zack Kelly on the 7-day injured list.
	05/03/2019	Mobile BayBears activated RHP Zack Kelly from the 7-day injured list.
	04/23/2019	Mobile BayBears placed RHP Zack Kelly on the 7-day injured list.
	04/18/2019	RHP Zack Kelly assigned to Mobile BayBears from Angels Extended Spring Training.
	04/14/2019	RHP Zack Kelly assigned to Angels Extended Spring Training from Mobile BayBears.
	04/11/2019	RHP Zack Kelly assigned to Mobile BayBears from Orem Owlz.
	04/02/2019	RHP Zack Kelly assigned to Orem Owlz from Mobile BayBears.
	04/01/2019	RHP Zack Kelly assigned to Mobile BayBears from Burlington Bees.
	02/25/2019	RHP Zack Kelly assigned to Los Angeles Angels.
	09/09/2018	Burlington Bees activated RHP Zack Kelly from the 7-day injured list.
	08/25/2018	Burlington Bees placed RHP Zack Kelly on the 7-day disabled list.
	07/12/2018	RHP Zack Kelly assigned to Burlington Bees from Inland Empire 66ers.
	07/06/2018	Inland Empire 66ers activated RHP Zack Kelly from the 7-day disabled list.
	06/29/2018	Inland Empire 66ers placed RHP Zack Kelly on the 7-day disabled list retroactive to June 28, 2018.
	06/23/2018	RHP Zack Kelly assigned to Inland Empire 66ers from Orem Owlz.
	06/14/2018	RHP Zack Kelly assigned to Orem Owlz from Angels Extended Spring Training.
	06/10/2018	RHP Zack Kelly assigned to Angels Extended Spring Training from Burlington Bees.
	06/08/2018	Burlington Bees placed RHP Zack Kelly on the 7-day disabled list.
	06/05/2018	RHP Zack Kelly assigned to Burlington Bees.
	04/27/2018	Los Angeles Angels signed free agent RHP Zack Kelly to a minor league contract.
	04/18/2018	AZL Athletics released RHP Zack Kelly.
	06/23/2017	RHP Zack Kelly assigned to AZL Athletics.
	06/16/2017	Oakland Athletics signed free agent RHP Zack Kelly to a minor league contract.

Platoon Splits

Team	L	Type	W	L	ERA	G	GS	SV	IP	BF	H	R	ER	HR	BB	SO	WHIP
Boston Red Sox	MLB	vs Left				7			5.0	20	4			0	1	4	1.00
Boston Red Sox	MLB	vs Right				7			5.0	25	8			1	1	7	1.80

Monthly Splits

Team	L	Type	W	L	ERA	G	IP	BF	H	R	ER	HR	BB	SO	WHIP
Boston Red Sox	MLB	March	0	0	0.00	1	2.0	7	1	0	0	0	0	1	0.50
Boston Red Sox	MLB	April	1	1	11.25	6	8.0	38	11	10	10	1	2	10	1.63
Boston Red Sox	MLB	Pre All-Star	1	1	9.00	7	10.0	45	12	10	10	1	2	11	1.40

Baserunner Splits

Team	L	Type	G	IP	BF	H	HR	BB	SO	WHIP
Boston Red Sox	MLB	Bases Empty	7	5.1	23	6	0	1	7	1.31
Boston Red Sox	MLB	Bases Loaded	1	0.0	1	1	0	0	0	-.--
Boston Red Sox	MLB	Runner at 1st	6	2.0	9	2	1	1	1	1.50
Boston Red Sox	MLB	Runners at 1st & 2nd	2	0.2	4	1	0	0	1	1.50
Boston Red Sox	MLB	Runner at 2nd	2	0.2	3	1	0	0	1	1.50
Boston Red Sox	MLB	Runners at 2nd & 3rd	1	0.1	1	0	0	0	0	0.00
Boston Red Sox	MLB	Runner at 3rd	2	1.0	4	1	0	0	1	1.00
Boston Red Sox	MLB	Scoring Position	5	2.2	13	4	0	0	3	1.50

Game Type Splits

Team	L	Type	W	L	ERA	G	GS	SV	IP	BF	H	R	ER	HR	BB	SO	WHIP
Boston Red Sox	MLB	Home Games	0	1	20.25	3	0	0	2.2	18	7	6	6	0	1	3	3.00
Boston Red Sox	MLB	Away Games	1	0	4.91	4	0	0	7.1	27	5	4	4	1	1	8	0.82
Boston Red Sox	MLB	Day Games	1	1	14.73	4	0	0	3.2	17	4	6	6	1	1	4	1.36
Boston Red Sox	MLB	Night Games	0	0	5.68	3	0	0	6.1	28	8	4	4	0	1	7	1.42
Boston Red Sox	MLB	Leading Off				6			2.0	11	4			0	1	2	2.50
Boston Red Sox	MLB	Late / Close				1			0.2	2	0			0	0	1	0.00

Outs Splits

Team	L	Type	G	IP	BF	H	HR	BB	SO	WHIP
Boston Red Sox	MLB	No Outs	7	4.0	20	5	0	2	4	1.75
Boston Red Sox	MLB	One Out	5	3.0	13	4	1	0	5	1.33
Boston Red Sox	MLB	Two Outs	6	3.0	12	3	0	0	2	1.00

Inning Splits

Team	L	Type	ERA	G	IP	BF	H	R	ER	HR	BB	SO	WHIP
Boston Red Sox	MLB	Fifth Inning	0.00	1	1.0	2	0	0	0	0	0	0	0.00
Boston Red Sox	MLB	Sixth Inning	7.71	3	2.1	11	3	2	2	1	1	3	1.71
Boston Red Sox	MLB	Seventh Inning	7.71	6	4.2	20	4	4	4	0	0	5	0.86
Boston Red Sox	MLB	Eighth Inning	13.50	2	1.1	7	2	2	2	0	1	3	2.25
Boston Red Sox	MLB	Ninth Inning	27.00	1	0.2	5	3	2	2	0	0	0	4.50

Platoon Splits

Team	L	Type	W	L	ERA	G	GS	SV	IP	BF	H	R	ER	HR	BB	SO	WHIP
Worcester Red Sox	Triple-A	vs Left				6			3.2	19	4			2	4	5	2.18
Worcester Red Sox	Triple-A	vs Right				6			3.1	20	2			0	8	4	3.00

Monthly Splits

Team	L	Type	L	ERA	G	GS	IP	BF	H	R	ER	HR	BB	SO	WHIP
Worcester Red Sox	Triple-A	April	1	16.62	3	1	4.1	25	5	8	8	2	7	5	2.77
Worcester Red Sox	Triple-A	May	0	6.75	3	0	2.2	14	1	2	2	0	5	4	2.25
Worcester Red Sox	Triple-A	First Half	1	12.86	6	1	7.0	39	6	10	10	2	12	9	2.57

Baserunner Splits

Team	L	Type	G	IP	BF	H	HR	BB	SO	WHIP
Worcester Red Sox	Triple-A	Bases Empty	5	3.0	17	5	1	3	6	2.67
Worcester Red Sox	Triple-A	Bases Loaded	3	0.2	5	0	0	3	1	4.50
Worcester Red Sox	Triple-A	Runner at 1st	4	1.2	7	0	0	2	1	1.20
Worcester Red Sox	Triple-A	Runners at 1st & 2nd	1	0.0	2	1	1	1	0	-.--
Worcester Red Sox	Triple-A	Runners at 1st & 3rd	2	0.0	0	0	0	0	0	-
Worcester Red Sox	Triple-A	Runner at 2nd	3	1.0	4	0	0	1	1	1.00
Worcester Red Sox	Triple-A	Runners at 2nd & 3rd	2	0.1	2	0	0	1	0	3.00
Worcester Red Sox	Triple-A	Runner at 3rd	2	0.1	2	0	0	1	0	3.00
Worcester Red Sox	Triple-A	Scoring Position	6	2.1	15	1	1	7	2	3.43

Game Type Splits

Team	L	Type	W	L	ERA	G	GS	SV	IP	BF	H	R	ER	HR	BB	SO	WHIP
Worcester Red Sox	Triple-A	Home Games	0	1	12.79	4	1	0	6.1	32	6	9	9	2	7	8	2.05
Worcester Red Sox	Triple-A	Away Games	0	0	13.50	2	0	0	0.2	7	0	1	1	0	5	1	7.50
Worcester Red Sox	Triple-A	Day Games	0	1	34.71	2	1	0	2.1	16	5	9	9	2	4	3	3.86
Worcester Red Sox	Triple-A	Night Games	0	0	1.93	4	0	0	4.2	23	1	1	1	0	8	6	1.93
Worcester Red Sox	Triple-A	Leading Off				5			0.2	8	3			1	3	1	9.00
Worcester Red Sox	Triple-A	Late / Close				1			1.0	4	1			0	0	1	1.00

Outs Splits

Team	L	Type	G	IP	BF	H	HR	BB	SO	WHIP
Worcester Red Sox	Triple-A	No Outs	5	2.1	14	3	1	4	2	3.00
Worcester Red Sox	Triple-A	One Out	4	2.0	13	3	1	4	4	3.50
Worcester Red Sox	Triple-A	Two Outs	5	2.2	12	0	0	4	3	1.50

Inning Splits

Team	L	Type	ERA	G	IP	BF	H	R	ER	HR	BB	SO	WHIP
Worcester Red Sox	Triple-A	First Inning	216.00	1	0.1	9	4	8	8	2	4	0	24.00
Worcester Red Sox	Triple-A	Sixth Inning	0.00	4	2.2	13	0	0	0	0	5	3	1.88
Worcester Red Sox	Triple-A	Seventh Inning	6.00	4	3.0	13	2	2	2	0	2	5	1.33
Worcester Red Sox	Triple-A	Eighth Inning	0.00	1	1.0	4	0	0	0	0	1	1	1.00

Date	Home Tm	Away Tm	W	L	ERA	G	IP	H	R	ER	HR	BB	SO	WHIP
2025-03-29	Texas Rangers	Boston Red Sox	0	0	0.00	1	2.0	1	0	0	0	0	1	0.50
March	Boston Red Sox		0	0	0.00	1	2.0	1	0	0	0	0	1	0.50
2025-04-03	Baltimore Orioles	Boston Red Sox	1	0	0.00	1	1.0	0	0	0	0	0	0	0.33
2025-04-04	Boston Red Sox	St. Louis Cardinals	0	0	2.25	1	1.0	2	1	1	0	0	1	0.75
2025-04-08	Boston Red Sox	Toronto Blue Jays	0	0	4.76	1	1.2	4	2	2	0	1	2	1.41
2025-04-12	Chicago White Sox	Boston Red Sox	0	0	6.14	1	1.2	1	2	2	1	1	3	1.36
2025-04-15	Tampa Bay Rays	Boston Red Sox	0	0	6.30	1	2.2	3	2	2	0	0	4	1.30
2025-04-20	Boston Red Sox	Chicago White Sox	0	1	9.00	1	0.0	1	3	3	0	0	0	1.40
April	Boston Red Sox		1	1	11.25	6	8.0	11	10	10	1	2	10	1.63

Date	Home Tm	Away Tm	L	ERA	G	GS	IP	H	R	ER	HR	BB	SO	WHIP
2025-04-24	Worcester Red Sox	Syracuse Mets	0	0.00	1	0	2.0	1	0	0	0	1	2	1.00
2025-04-27	Worcester Red Sox	Syracuse Mets	1	30.86	1	1	0.1	4	8	8	2	4	0	4.29
2025-04-30	Worcester Red Sox	Toledo Mud Hens	0	16.62	1	0	2.0	0	0	0	0	2	3	2.77
April	Worcester Red Sox		1	16.62	3	1	4.1	5	8	8	2	7	5	2.77
2025-05-04	Worcester Red Sox	Toledo Mud Hens	0	12.79	1	0	2.0	1	1	1	0	0	3	2.05
2025-05-08	Lehigh Valley IronPigs	Worcester Red Sox	0	12.15	1	0	0.1	0	0	0	0	1	1	2.10
2025-05-10	Lehigh Valley IronPigs	Worcester Red Sox	0	12.86	1	0	0.1	0	1	1	0	4	0	2.57
May	Worcester Red Sox		0	6.75	3	0	2.2	1	2	2	0	5	4	2.25

Statcast Statistics

Season	Age	Pitches	Batted Balls	Barrels	Barrel %	Barrel/PA	Exit Velocity	Max EV	Launch Angle	LA Sweet- Spot %	XBA	XSLG	WOBA	XWOBA	XWOBACON	HardHit%	K%	BB%	ERA	xERA
2022	27	222	44	3	6.8	5.1	85.0	109.2	12.6	29.5	.199	.343	.316	.261	.287	25.0	18.6	6.8	3.95	2.79
2023	28	181	26	2	7.7	4.7	89.5	109.9	8.7	30.8	.225	.381	.357	.362	.315	46.2	14.0	18.6	3.86	5.74
2024	29	957	151	15	9.9	6.2	87.2	114.4	12.0	35.1	.227	.411	.300	.318	.381	31.1	25.3	11.2	3.97	4.25
2025	30	164	30	3	10.0	6.7	88.7	107.7	12.4	43.3	.262	.435	.353	.334	.406	46.7	24.4	4.4	9.00	4.26
Player		1524	251	23	9.2	5.9	87.2	114.4	11.8	34.7	.226	.400	.315	.316	.361	33.5	22.9	10.6
MLB					7.0	4.8	88.5	122.4	12.3	33.2	.245	.405	.316	.315	.368	36.7	22.2	8.4

! Note: All figures in this table cover the period 2015-present.

Statcast Pitch Arsenal

Kelly relies on 5 pitches.

Four Seamer

(32.9%) ,

Sweeper

(24.4%) ,

Cutter

(23.8%) ,

Changeup

(12.8%) ,

Sinker

(6.1%) ,

+ If Available Pitches Click to Video.

+ View Zack Kelly's Pitches in 3d

Pitch Tracking

Batted Ball Profile

Season	GB %	AIR %	FB %	LD %	PU %	Pull %	Straight %	Oppo %	Pull GB %	Straight GB %	Oppo GB %	Pull AIR %	Straight AIR %	Oppo AIR %
		AIR: Fly Balls + Line Drives + Popups				All Batted Balls			Batted Ball Breakdown
2022	45.5	54.5	31.8	13.6	9.1	36.4	40.9	22.7	15.9	20.5	9.1	20.5	20.5	13.6
2023	53.8	46.2	26.9	19.2	0.0	34.6	42.3	23.1	23.1	23.1	7.7	11.5	19.2	15.4
2024	47.7	52.3	24.5	20.5	7.3	38.4	39.7	21.9	25.2	17.2	5.3	13.2	22.5	16.6
2025	40.0	60.0	20.0	33.3	6.7	33.3	40.0	26.7	23.3	13.3	3.3	10.0	26.7	23.3
Player	47.0	53.0	25.5	20.7	6.8	37.1	40.2	22.7	23.1	17.9	6.0	13.9	22.3	16.7
MLB	44.4	55.6	23.8	24.7	7.1	37.2	37.4	25.2	20.6	17.8	5.9	16.6	19.7	19.3

! Note: All figures in this table cover the period 2015-present.

Quality of Contact

Season	Weak %	Topped %	Under %	Flare/Burner %	Solid %	Barrel %	Barrel/PA
2022	9.1	31.8	31.8	13.6	4.5	6.8	5.1
2023	3.8	38.5	30.8	19.2	0.0	7.7	4.7
2024	6.0	36.4	21.2	21.9	4.6	9.9	6.2
2025	3.3	33.3	20.0	23.3	10.0	10.0	6.7
Player	6.0	35.5	23.9	20.3	4.8	9.2	5.9
MLB	3.9	32.6	24.8	24.4	5.9	7.0	4.8

! Note: All figures in this table cover the period 2015-present.

Similar Pitchers to Zack Kelly:

2024 - Charlie Morton

2024 - Adrian Morejon

2024 - Michael Grove

2024 - Luke Jackson

2024 - Hayden Wesneski

--- Compare All Similar Pitchers

Pitch Movement

How this works: This section shows two different ways to evaluate pitch movement. On the left, “Total Movement” shows the real-world movement of a pitch, including the forces of gravity, which affects every pitch thrown. Since gravity requires time, and slower pitches aren't 'better' just because they have more time to move, a pitch's movement is compared to other pitches of the same pitch type, within +/- 2 MPH and +/- 0.5 feet of extension/release. On the right, Induced Movement (or IVB) is reported without gravity, and attempts to isolate movement created by the pitcher's ability to spin and manipulate the ball.

						Total Movement (in inches, w/ gravity)				Induced Movement (in inches, w/o gravity)
Year	Pitch	Team	Hand	#	MPH	Vertical Drop	vs. Comparable	Horizontal Break	vs. Comparable	Vertical Break	vs. Avg	Horizontal Break	vs. Avg
2025	Cutter	BOS	R	39	91.8	23.4	-0.3	0.3GLV	-1.3	9.2	0.9	0.3GLV	-2.0
2025	Changeup	BOS	R	21	83.8	37.2	1.7	19.0ARM	4.3	2.1	2.0	19.0ARM	4.2
2025	4-Seam Fastball	BOS	R	54	96.0	14.9	-1.1	11.1ARM	3.5	15.1	-0.8	11.1ARM	3.4
2025	Sinker	BOS	R	10	94.4	17.6	-4.6	17.3ARM	2.0	13.5	-6.2	17.3ARM	1.9
2025	Sweeper	BOS	R	40	82.0	37.7	-1.2	15.4GLV	1.2	3.4	-1.9	15.4GLV	1.4
2024	Changeup	BOS	R	200	83.6	38.9	3.8	18.0ARM	3.5	0.5	4.4	18.0ARM	3.8
2024	Sweeper	BOS	R	260	82.2	38.1	-0.2	17.6GLV	3.6	2.5	-0.9	17.6GLV	3.4
2024	Cutter	BOS	R	209	91.1	26.2	-1.9	2.2GLV	0.2	6.8	-1.5	2.2GLV	-0.5
2024	4-Seam Fastball	BOS	R	286	96.5	14.6	-0.8	9.7ARM	1.8	14.9	-0.8	9.7ARM	2.1
2023	Sweeper	BOS	R	3	85.1	36.1	-0.3	5.6GLV	-7.3	1.9	-0.5	5.6GLV	-8.5
2023	4-Seam Fastball	BOS	R	83	94.5	15.4	-0.4	11.7ARM	4.2	15.6	-0.2	11.7ARM	4.3
2023	Changeup	BOS	R	63	82.3	35.5	-0.5	19.5ARM	5.0	5.5	-0.1	19.5ARM	5.1
2023	Slider	BOS	R	24	85.6	34.2	-1.6	5.9GLV	1.1	3.2	-1.8	5.9GLV	0.9
2023	Cutter	BOS	R	6	87.1	32.0	-2.6	3.8GLV	0.8	4.5	-3.4	3.8GLV	1.2
2022	Changeup	BOS	R	87	82.0	33.9	-1.2	17.6ARM	2.9	7.1	-1.2	17.6ARM	3.4
2022	4-Seam Fastball	BOS	R	105	94.6	15.0	-0.4	11.2ARM	3.5	15.8	-0.4	11.2ARM	3.8
2022	Sweeper	BOS	R	1	84.6	34.6	-0.9	3.9GLV	-9.0	3.6	-2.1	3.9GLV	-10.0
2022	Slider	BOS	R	29	85.7	35.6	0.2	6.6GLV	1.7	1.6	0.2	6.6GLV	1.0

! Note: Years are in reverse order.

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Run Values by Pitch Type

Year	Pitch Type	RV/100	Run Value	Pitches	%	PA	BA	SLG	wOBA	Whiff%	K%	PutAway %	xBA	xSLG	xwOBA	Hard Hit %
2025	4-Seam Fastball	-4.4	-2	54	32.9	15	.385	.846	.537	32.1	20.0	20.0	.258	.571	.395	50.0
2025	Sweeper	2.9	1	40	24.4	9	.000	.000	.078	23.5	44.4	25.0	.044	.076	.121	25.0
2025	Cutter	-0.8	0	39	23.8	11	.400	.400	.391	19.0	18.2	25.0	.380	.519	.414	62.5
2025	Changeup	2.1	0	21	12.8	6	.167	.167	.150	33.3	33.3	22.2	.174	.208	.170	0.0
2025	Sinker	-6.3	-1	10	6.1	4	.500	.500	.450	0.0	0.0	0.0	.550	.839	.592	75.0
2024	4-Seam Fastball	-1.0	-3	286	29.9	81	.250	.344	.362	23.0	24.7	17.9	.277	.481	.402	38.6
2024	Sweeper	2.3	6	260	27.2	61	.138	.224	.197	34.4	32.8	21.3	.125	.193	.165	15.8
2024	Cutter	-0.6	-1	209	21.8	52	.277	.574	.390	21.9	11.5	22.2	.296	.524	.383	46.3
2024	Changeup	-0.5	-1	200	20.9	44	.163	.465	.288	32.6	34.1	20.5	.213	.476	.300	17.9
2023	4-Seam Fastball	-1.8	-1	84	46.4	21	.286	.429	.438	14.7	9.5	10.5	.273	.500	.450	66.7
2023	Changeup	-1.4	-1	63	34.8	16	.167	.333	.331	34.6	18.8	11.1	.124	.247	.290	11.1
2023	Slider	2.2	1	25	13.8	5	.200	.400	.250	18.2	20.0	20.0	.351	.406	.332	75.0
2023	Cutter	-1.2	0	6	3.3		--	--	--	0.0	--	--	--	--	--	--
2023	Sweeper	7.2	0	3	1.7	1	.000	.000	.000	50.0	0.0	0.0	.134	.188	.128	0.0
2022	4-Seam Fastball	2.4	3	105	47.3	27	.167	.208	.240	11.6	14.8	17.4	.169	.191	.195	23.8
2022	Changeup	-1.8	-2	87	39.2	23	.333	.524	.398	20.5	26.1	19.4	.191	.360	.276	20.0
2022	Slider	-5.4	-2	29	13.1	9	.333	.778	.461	26.7	11.1	33.3	.291	.691	.416	37.5
2022	Sweeper	3.8	0	1	0.5		--	--	--	--	--	--	--	--	--	--

! Note: Years are in reverse order.

! Note: To better align with other values, positive numbers (red) are good, and negative numbers (blue) are poor.

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Spin Direction

Year	Pitch Type	Pitches	MPH	Active Spin %	Total Movement (In.)	Spin-Based	Observed	Deviation
2025	Changeup	21	83.8	95	20.1	3:00	3:00	0
2025	Cutter	39	91.8	61	8.4	12:15	12:00	15
2025	4-Seam Fastball	54	96.0	94	18.6	1:15	1:15	0
2025	Sinker	10	94.4	94	22.0	1:15	1:45	-30
2025	Sweeper	40	82.0	52	16.4	8:15	9:15	-60
2024	Changeup	200	83.6	94	18.9	3:00	3:15	-15
2024	Cutter	208	91.1	48	6.5	12:00	11:15	45
2024	4-Seam Fastball	286	96.5	95	17.6	1:15	1:15	0
2024	Sweeper	258	82.2	57	18.8	8:15	9:00	-45
2023	Changeup	63	82.3	91	20.8	3:00	2:45	15
2023	4-Seam Fastball	77	94.6	96	19.3	1:15	1:15	0
2023	Slider	22	85.5	39	7.0	10:00	9:30	30
2022	Changeup	86	81.9	85	19.3	3:00	2:30	30
2022	4-Seam Fastball	105	94.6	98	19.2	1:15	1:15	0
2022	Slider	29	85.7	34	7.5	10:15	9:15	60

! Note: Years are in reverse order.

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! Note: This table is showing data from the PITCHER perspective.

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Pitcher Arm Angle

! Note: Data is available from 2020 through the present.

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Statcast Pitching Run Value

				Runs
Year	Team	PA	Pitches	Heart	Shadow	Chase	Waste	All
2022		59	222	1	1	-2	-1	-1
2023		43	181	2	2	-4	-1	-2
2024		238	955	-1	14	-8	-4	1
2025		45	164	-1	1	-1	-1	-2
Player		385	1,522	2	18	-15	2	-3

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Statcast Pitching Run Value (Leveraged)

These run values are leveraged, meaning the base/out situation at the time of the event does impact the run value (thus introducing context outside the batter's own contribution).

				Runs
Year	Team	PA	Pitches	Heart	Shadow	Chase	Waste	All	+/- Due To Leverage
2022		59	222	1	0	-3	-1	-2	-2
2023		43	181	4	4	-5	-2	0	2
2024		238	955	1	11	-8	-4	0	-1
2025		45	164	-1	0	-1	-2	-4	-3
Player		385	1,522	5	15	-18	5	-6	-3

Plate Discipline

Season	Pitches	Zone %	Zone Swing %	Zone Contact %	Chase %	Chase Contact %	Edge %	1st Pitch Strike %	Swing %	Whiff %	Meatball %	Meatball Swing %
2022	222	53.6	68.1	87.7	20.4	61.9	36.5	64.4	45.9	17.6	9.9	72.7
2023	181	42.5	61.0	76.6	26.0	74.1	42.5	46.5	40.9	23.0	7.2	61.5
2024	957	49.2	66.9	78.7	26.7	54.6	43.6	67.8	46.5	28.1	7.4	81.7
2025	164	48.2	70.9	82.1	28.2	54.2	37.8	71.1	48.8	25.0	6.1	90.0
Player	1,524	49.0	66.9	80.4	26.0	57.9	41.8	65.3	46.0	25.7	7.6	78.4
MLB		48.7	67.0	82.0	28.4	57.7	42.6	61.1	47.2	25.0	7.3	76.3

! Note: All figures in this table cover the period 2015-present.

Percentile Rankings

Year	xwOBA / xERA	xBA	xSLG	xISO	xOBP	Brl	Brl%	EV	Hard Hit%	K%	BB%	Whiff%	Chase Rate	FB Velo	FB Spin	Extension
2022														63	29	79
2023														58	29	88
2024	36	66	31	13	36	54	12	87	95	70	13	70	26	87	30	92
2025														76	23	89

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Expected Home Runs

Adjusted

Year	Avg HR Trot	Actual HR	xHR	HR-xHR	Doubters	Mostly Gone	No Doubters	No Doubter %
2022	22.8	2	1.4	1	3	1	0	0.0
2023	--	0	0.9	-1	2	1	0	--
2024	24.6	10	9.4	1	2	6	5	50.0
2025	25.5	1	1.0	0	0	1	0	0.0
Player	24.4	13	12.7	0	7	9	5	38.5

Note: xHR tells how many of this pitcher's home runs allowed would have been out of other stadiums. The "Adjusted" view here accounts for different wall heights, distances and environmental effects using Statcast Park Factor data.

Standard

Year	Avg HR Trot	Actual HR	xHR	HR-xHR	Doubters	Mostly Gone	No Doubters	No Doubter %
2022	22.8	2	1.5	1	2	2	0	0.0
2023	--	0	1.2	-1	0	2	0	--
2024	24.6	10	9.2	1	2	6	5	50.0
2025	25.5	1	0.8	0	0	1	0	0.0
Player	24.4	13	12.7	0	4	11	5	38.5

Note: xHR tells how many of this pitcher's home runs allowed would have been out of other stadiums. The "Standard" view here accounts for different wall heights and distances but excludes environmental effects. It is based purely on the observed trajectory of the hit.

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Expected Home Runs by Park

Adjusted

Year	HR
2022	2	2	2	0	1	2	2	1	0	1	1	2	1	1	1	1	1	1	2	1	2	3	2	3	1	1	1	2	3	1	1
2023	0	1	0	1	1	1	1	1	0	1	0	1	2	1	1	1	1	1	1	2	1	0	2	1	1	1	0	0	1	1	1
2024	10	10	8	11	9	9	11	10	8	8	8	9	12	9	8	9	8	8	11	10	11	9	11	11	10	8	9	9	11	8	8
2025	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	0
Player	13	14	11	13	12	13	15	13	9	11	10	13	16	12	11	12	11	11	15	14	15	13	16	16	13	11	11	12	16	11	10

Standard

Year	HR
2022	2	2	3	0	0	2	3	2	0	1	1	2	2	2	3	1	1	1	2	2	2	3	1	2	1	1	0	0	2	2	1
2023	0	1	1	2	0	2	2	2	0	0	0	1	2	2	1	0	1	1	2	2	2	1	2	2	1	1	0	0	2	1	1
2024	10	9	9	11	8	9	11	10	10	8	7	9	12	10	10	9	8	8	11	10	10	11	11	11	7	8	7	6	11	8	8
2025	1	1	1	1	1	1	1	1	1	0	0	1	1	1	1	1	1	1	1	1	1	1	1	1	0	1	1	0	1	1	0
Player	13	13	14	14	9	14	17	15	11	9	8	13	17	15	15	11	11	11	16	15	15	16	15	16	9	11	8	6	16	12	10

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Year to Year Changes

Metric	2022	+/-		2023	+/-		2024	+/-		2025
Fastball Velocity	94.6	-0.6	↓	94.0	0.2	↑	94.2	0.0		94.2
Offspeed Velocity	82.0	0.3	↑	82.3	1.3	↑	83.6	0.2	↑	83.8
Breaking Velocity	85.7	-0.1	↓	85.6	-3.4	↓	82.2	-0.2	↓	82.0
Exit Velocity	85.0	4.5	↑	89.5	-2.3	↓	87.2	1.5	↑	88.7
Launch Angle	12.6	-3.9	↓	8.7	3.3	↑	12.0	0.4	↑	12.4
Barrel %	6.8	0.9	↑	7.7	2.2	↑	9.9	0.1	↑	10.0
Hard Hit %	25.0	21.2	↑	46.2	-15.1	↓	31.1	15.6	↑	46.7
LA Sweet-Spot %	29.5	1.3	↑	30.8	4.3	↑	35.1	8.2	↑	43.3
xBA	.199	0.026	↑	.225	0.002	↑	.227	0.035	↑	.262
BA	.259	-0.040	↓	.219	-0.011	↓	.208	0.085	↑	.293
xwOBA	.261	0.101	↑	.362	-0.044	↓	.318	0.016	↑	.334
wOBA	.316	0.041	↑	.357	-0.057	↓	.300	0.053	↑	.353
xSLG	.343	0.038	↑	.381	0.030	↑	.411	0.024	↑	.435
SLG	.426	-0.051	↓	.375	0.012	↑	.387	0.052	↑	.439
K%	18.6	-4.6	↓	14.0	11.3	↑	25.3	-0.9	↓	24.4
BB%	6.8	11.8	↑	18.6	-7.4	↓	11.2	-6.8	↓	4.4
Swing %	45.9	-5.0	↓	40.9	5.6	↑	46.5	2.3	↑	48.8
Whiff%	17.6	5.4	↑	23.0	5.1	↑	28.1	-3.1	↓	25.0
In Zone %	53.6	-11.1	↓	42.5	6.7	↑	49.2	-1.0	↓	48.2
Out of Zone %	46.4	11.1	↑	57.5	-6.7	↓	50.8	1.0	↑	51.8
Out of Zone Swing %	20.4	5.6	↑	26.0	0.7	↑	26.7	1.5	↑	28.2
First Pitch Swing %	28.8	-7.9	↓	20.9	13.4	↑	34.3	1.3	↑	35.6
First Pitch Strike %	64.4	-17.9	↓	46.5	21.3	↑	67.8	3.3	↑	71.1

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Statcast Fielder Positioning

				vs RHH			vs LHH
Year	Alignment Type	PA	wOBA	PA	Total	%	PA	Total	%
2022	Shifts	59	.316	32	4	12.5	27	22	81.5
2023	Shades	43	.357	19	0	0.0	24	7	29.2
2024	Shades	236	.294	132	13	9.8	104	51	49.0
2025	Shades	45	.353	25	1	4.0	20	13	65.0

! Note: Shifts are through the 2022 season, Shaded starting from the 2023 season, Shift: three or more infielders are on the same side of second base, Shade: positioned outside of their typical responsible slices of the field.
Learn more about how positioning is defined here

Pitch Tempo

		Bases Empty				Runners On Base
Season	Team	Pitches	Tempo	Fast %	Slow %	Pitches	Tempo	Fast %	Slow %
2022		61	18.7	1.6%	1.6%	42	21.5	0.0%	0.0%
2023		38	16.5	10.5%	0.0%	44	20.8	0.0%	0.0%
2024		247	17.3	10.5%	0.4%	177	19.6	1.1%	2.3%
2025		33	16.3	27.3%	0.0%	29	19.6	3.4%	0.0%

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Year	Team	Baserunning Runs	Runs via Extra Bases	Runs via SB	Advance Attempts	Advances	Thrown Out	Holds	XB Adv Attempts	SB (2B) Runs	SB (3B) Runs	SB (2B) Above Avg	SB (3B) Above Avg	SB Adv Attempts
			Run Value Breakdown			Extra Bases Taken Run Value				Stolen Bases Run Value		Stolen Base Advances

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Statcast Basestealing

Expresses value added through stolen bases as a runner

Year	Team	Base	Basestealing Runs	Net Base Advances	Advances vs Avg	Outs vs Avg	Steal Opportunities	Steal Attempt %	Advances Gained (SB+BK)	Outs Created (CS+PK)	Lead Dist Gained (all SB opps)	Lead Dist Gained (only SB att)
				Advances Breakdown			How often does the runner attempt steals		How successful was the runner at steals		How good were the runner's leads

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Statcast Extra Bases Taken

Expresses value at advancing extra bases as a runner (not including steals)

Year	Team	Extra Bases Gained Runs	Advances	Thrown Out	Holds	Advance Opportunities	Advance Attempt %	Est. Attempt %	Attempt % Above Average	Safe on Advances	Safe / Opportunity	Safe / Attempt
			Runs Breakdown			How often does the runner attempt to advance				How often was the runner successful in advancing

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