William Kempner Stats: Statcast, Visuals & Advanced Metrics

P | Miami Marlins

Bats/Throws: R/R | 6' 0" 222 lbs | Age: 24

Draft: 2022 | Rd. 3, No. 106, San Francisco Giants | Gonzaga

	W	L	ERA	G	GS	SV	IP	SO	WHIP
2025	3	0	2.65	13	0	1	17	25	1.35
Career Minors	12	8	3.10	91	7	8	139.1	184	1.26

	G	W-L	ERA	IP	SO	WHIP
2025	13	3-0	2.65	17	25	1.35
Career Minors	91	12-8	3.10	139.1	184	1.26

Standard Splits Game Logs

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
2022	2 Teams		Minors	1	0	5.00	5	2	0	9.0	10	5	5	1	6	11	1.78
2022	ACL Giants Black	ACL	ROK	1	0	2.70	2	0	0	3.1	4	1	1	0	2	5	1.80
2022	San Jose Giants	CAL	A	0	0	6.35	3	2	0	5.2	6	4	4	1	4	6	1.76
2023	3 Teams		Minors	4	5	3.73	38	5	1	62.2	52	34	26	5	30	78	1.31
2023	San Jose Giants	CAL	A	1	3	4.67	14	5	1	27.0	21	18	14	0	15	29	1.33
2023	Eugene Emeralds	NWL	A+	3	2	2.91	23	0	0	34.0	28	15	11	5	13	47	1.21
2023	Richmond Flying Squirrels	EAS	AA	0	0	5.40	1	0	0	1.2	3	1	1	0	2	2	3.00
2025	3 Teams		Minors	7	3	2.26	48	0	7	67.2	38	20	17	2	40	95	1.15
2025	Beloit Sky Carp	MID	A+	1	2	3.04	19	0	6	26.2	19	11	9	0	10	39	1.09
2025	Pensacola Blue Wahoos	SOU	AA	3	1	1.13	16	0	0	24.0	11	4	3	0	15	31	1.08
2025	Jacksonville Jumbo Shrimp	INT	AAA	3	0	2.65	13	0	1	17.0	8	5	5	2	15	25	1.35
	ACL Giants	ACL	ROK	1	0	2.70	2	0	0	3.1	4	1	1	0	2	5	1.80
	Jacksonville Jumbo Shrimp	INT	AAA	3	0	2.65	13	0	1	17.0	8	5	5	2	15	25	1.35
	2 Teams		AA	3	1	1.40	17	0	0	25.2	14	5	4	0	17	33	1.21
	2 Teams		A+	4	4	2.97	42	0	6	60.2	47	26	20	5	23	86	1.15
	San Jose Giants	CAL	A	1	3	4.96	17	7	1	32.2	27	22	18	1	19	35	1.41
Career Minors	7 Teams			12	8	3.10	91	7	8	139.1	100	59	48	8	76	184	1.26

Standard Minor League Fielding Statistics

Season	Tm	LG	L	POS	G	GS	INN	TC	PO	A	E	DP	FPCT%
2022	2 Teams		Minors	P	5	2	9.0	1	1	0	0	1	1.000
2022	ACL Giants Black	ACL	ROK	P	2	0	3.1	0	0	0	0	0	.000
2022	San Jose Giants	CAL	A	P	3	2	5.2	1	1	0	0	1	1.000
2023	3 Teams		Minors	P	38	5	62.2	14	4	9	1	1	.929
2023	San Jose Giants	CAL	A	P	14	5	27.0	9	1	8	0	1	1.000
2023	Eugene Emeralds	NWL	A+	P	23	0	34.0	5	3	1	1	0	.800
2023	Richmond Flying Squirrels	EAS	AA	P	1	0	1.2	0	0	0	0	0	.000
2025	3 Teams		Minors	P	48	0	67.2	9	3	4	2	0	.778
2025	Beloit Sky Carp	MID	A+	P	19	0	26.2	2	0	0	2	0	.000
2025	Pensacola Blue Wahoos	SOU	AA	P	16	0	24.0	4	2	2	0	0	1.000
2025	Jacksonville Jumbo Shrimp	INT	AAA	P	13	0	17.0	3	1	2	0	0	1.000
	ACL Giants	ACL	ROK	P	2	0	3.1	0	0	0	0	0	.000
	Jacksonville Jumbo Shrimp	INT	AAA	P	13	0	17.0	3	1	2	0	0	1.000
	2 Teams		AA	P	17	0	25.2	4	2	2	0	0	1.000
	2 Teams		A+	P	42	0	60.2	7	3	1	3	0	.571
	San Jose Giants	CAL	A	P	17	7	32.2	10	2	8	0	2	1.000
Career Minors	7 Teams			P	91	7	139.1	24	8	13	3	2	.875

Transactions

Team	Date	Transaction
	11/18/2025	Miami Marlins selected the contract of RHP William Kempner from Jacksonville Jumbo Shrimp.
	08/12/2025	RHP William Kempner assigned to Jacksonville Jumbo Shrimp from Pensacola Blue Wahoos.
	06/10/2025	RHP William Kempner assigned to Pensacola Blue Wahoos from Beloit Sky Carp.
	06/10/2025	Pensacola Blue Wahoos activated RHP William Kempner.
	04/03/2025	RHP William Kempner assigned to Beloit Sky Carp from Pensacola Blue Wahoos.
	02/28/2025	RHP William Kempner assigned to Miami Marlins.
	01/15/2025	San Francisco Giants traded RHP William Kempner to Miami Marlins for Future Considerations. International Bonus Pool Money.
	01/15/2025	RHP William Kempner assigned to Pensacola Blue Wahoos.
	11/03/2024	Richmond Flying Squirrels activated RHP William Kempner.
	09/25/2024	RHP William Kempner assigned to Scottsdale Scorpions.
	08/09/2024	Richmond Flying Squirrels transferred RHP William Kempner from the 7-day injured list to the 60-day injured list.
	04/05/2024	Richmond Flying Squirrels placed RHP William Kempner on the 7-day injured list.
	09/16/2023	RHP William Kempner assigned to Richmond Flying Squirrels from Eugene Emeralds.
	09/16/2023	Richmond Flying Squirrels activated RHP William Kempner.
	06/13/2023	RHP William Kempner assigned to Eugene Emeralds from San Jose Giants.
	06/13/2023	Eugene Emeralds activated RHP William Kempner.
	08/30/2022	RHP William Kempner assigned to San Jose Giants from ACL Giants Black.
	08/11/2022	RHP William Kempner assigned to ACL Giants Black.
	07/28/2022	San Francisco Giants signed RHP William Kempner.
	06/11/2022	College Workout activated RHP William Kempner.
	06/11/2022	RHP William Kempner assigned to College Workout.
	03/17/2022	Gonzaga Bulldogs activated RHP William Kempner.
	03/17/2022	RHP William Kempner assigned to Gonzaga Bulldogs.

Platoon Splits

Team	L	Type	W	L	ERA	G	GS	SV	IP	BF	H	R	ER	HR	BB	SO	WHIP
3 Teams	Minors	vs Left				43			28.1	119	13			1	20	42	1.16
3 Teams	Minors	vs Right				47			39.1	164	25			1	20	53	1.14

Monthly Splits

Team	L	Type	W	L	ERA	G	SV	IP	BF	H	R	ER	HR	BB	SO	WHIP
Beloit Sky Carp	High-A	April	1	0	5.59	7	1	9.2	45	10	7	6	0	4	10	1.45
Beloit Sky Carp	High-A	May	0	2	1.84	10	4	14.2	58	9	4	3	0	5	23	0.95
2 Teams	Minors	June	0	1	3.24	6	1	8.1	36	5	4	3	0	6	13	1.32
Pensacola Blue Wahoos	Double-A	July	3	0	0.00	8	0	12.2	49	6	0	0	0	7	16	1.03
2 Teams	Minors	August	1	0	2.19	11	1	12.1	49	4	3	3	2	9	18	1.05
Jacksonville Jumbo Shrimp	Triple-A	September	2	0	1.80	6	0	10.0	46	4	2	2	0	9	15	1.30
2 Teams	Minors	First Half	1	3	3.19	22	6	31.0	131	23	14	11	0	13	45	1.16
2 Teams	Minors	Second Half	6	0	1.47	26	1	36.2	152	15	6	6	2	27	50	1.15

Baserunner Splits

Team	L	Type	G	IP	BF	H	HR	BB	SO	WHIP
3 Teams	Minors	Bases Empty	44	30.0	138	19	0	23	46	1.40
3 Teams	Minors	Bases Loaded	10	5.1	17	2	1	2	5	0.75
3 Teams	Minors	Runner at 1st	35	12.2	53	6	1	8	16	1.11
3 Teams	Minors	Runners at 1st & 2nd	13	5.2	24	5	0	1	9	1.06
3 Teams	Minors	Runners at 1st & 3rd	11	4.2	11	0	0	0	7	0.00
3 Teams	Minors	Runner at 2nd	17	5.2	25	4	0	5	6	1.59
3 Teams	Minors	Runners at 2nd & 3rd	4	1.0	4	1	0	0	3	1.00
3 Teams	Minors	Runner at 3rd	9	2.2	11	1	0	1	3	0.75
3 Teams	Minors	Scoring Position	31	25.0	92	13	1	9	33	0.88

Game Type Splits

Team	L	Type	W	L	ERA	G	GS	SV	IP	BF	H	R	ER	HR	BB	SO	WHIP
3 Teams	Minors	Home Games	2	3	3.48	22	0	2	31.0	133	21	14	12	2	19	48	1.29
3 Teams	Minors	Away Games	5	0	1.23	26	0	5	36.2	150	17	6	5	0	21	47	1.04
3 Teams	Minors	Day Games	0	2	1.65	12	0	3	16.1	70	11	5	3	0	10	19	1.29
3 Teams	Minors	Night Games	7	1	2.45	36	0	4	51.1	213	27	15	14	2	30	76	1.11
3 Teams	Minors	Leading Off				43			14.1	62	9			0	8	23	1.19
3 Teams	Minors	Late / Close				16			18.0	72	11			1	8	24	1.06

Outs Splits

Team	L	Type	G	IP	BF	H	HR	BB	SO	WHIP
3 Teams	Minors	No Outs	44	22.0	94	14	0	13	29	1.23
3 Teams	Minors	One Out	46	23.0	100	15	2	15	26	1.30
3 Teams	Minors	Two Outs	46	22.2	89	9	0	12	40	0.93

Inning Splits

Team	L	Type	ERA	G	IP	BF	H	R	ER	HR	BB	SO	WHIP
Jacksonville Jumbo Shrimp	Triple-A	Fourth Inning	0.00	1	1.0	3	0	0	0	0	0	1	0.00
3 Teams	Minors	Fifth Inning	1.93	7	4.2	25	2	1	1	0	8	7	2.14
3 Teams	Minors	Sixth Inning	2.35	16	15.1	65	5	5	4	0	12	20	1.11
3 Teams	Minors	Seventh Inning	1.50	14	12.0	46	7	2	2	1	3	19	0.83
3 Teams	Minors	Eighth Inning	3.38	19	16.0	65	10	6	6	0	8	23	1.13
3 Teams	Minors	Ninth Inning	1.08	18	16.2	69	11	2	2	0	7	25	1.08
3 Teams	Minors	Extra Innings	9.00	3	2.0	10	3	4	2	1	2	0	2.50

Date	Home Tm	Away Tm	W	L	ERA	G	SV	IP	H	R	ER	HR	BB	SO	WHIP
2025-04-05	Beloit Sky Carp	South Bend Cubs	0	0	0.00	1	0	2.0	3	0	0	0	0	1	1.50
2025-04-09	Cedar Rapids Kernels	Beloit Sky Carp	1	0	0.00	1	0	1.1	0	0	0	0	0	3	0.90
2025-04-12	Cedar Rapids Kernels	Beloit Sky Carp	0	0	3.38	1	0	2.0	2	3	2	0	1	1	1.13
2025-04-16	Beloit Sky Carp	Quad Cities River Bandits	0	0	2.84	1	0	1.0	0	0	0	0	1	1	1.11
2025-04-18	Beloit Sky Carp	Quad Cities River Bandits	0	0	7.04	1	0	1.1	3	4	4	0	2	3	1.57
2025-04-24	South Bend Cubs	Beloit Sky Carp	0	0	6.23	1	1	1.0	1	0	0	0	0	1	1.50
2025-04-29	Peoria Chiefs	Beloit Sky Carp	0	0	5.59	1	0	1.0	1	0	0	0	0	0	1.45
April	Beloit Sky Carp		1	0	5.59	7	1	9.2	10	7	6	0	4	10	1.45
2025-05-02	Peoria Chiefs	Beloit Sky Carp	0	0	5.23	1	1	0.2	0	0	0	0	0	0	1.35
2025-05-04	Peoria Chiefs	Beloit Sky Carp	0	0	4.63	1	1	1.1	1	0	0	0	1	2	1.37
2025-05-07	Beloit Sky Carp	Cedar Rapids Kernels	0	1	4.61	1	0	2.0	2	1	1	0	1	3	1.39
2025-05-09	Beloit Sky Carp	Cedar Rapids Kernels	0	0	5.40	1	0	1.1	2	2	2	0	0	3	1.40
2025-05-13	Wisconsin Timber Rattlers	Beloit Sky Carp	0	0	5.06	1	0	1.0	0	0	0	0	1	3	1.38
2025-05-17	Wisconsin Timber Rattlers	Beloit Sky Carp	0	0	4.50	1	1	2.0	0	0	0	0	1	4	1.28
2025-05-21	Beloit Sky Carp	Quad Cities River Bandits	0	1	4.26	1	0	1.0	1	1	0	0	1	0	1.32
2025-05-23	Beloit Sky Carp	Quad Cities River Bandits	0	0	3.86	1	0	2.0	1	0	0	0	0	6	1.24
2025-05-28	Lansing Lugnuts	Beloit Sky Carp	0	0	3.68	1	1	1.0	0	0	0	0	0	2	1.18
2025-05-30	Lansing Lugnuts	Beloit Sky Carp	0	0	3.33	1	0	2.1	2	0	0	0	0	0	1.15
May	Beloit Sky Carp		0	2	1.84	10	4	14.2	9	4	3	0	5	23	0.95
2025-06-04	Beloit Sky Carp	Fort Wayne TinCaps	0	0	3.16	1	0	1.1	0	0	0	0	0	3	1.09
2025-06-07	Beloit Sky Carp	Fort Wayne TinCaps	0	0	3.04	1	1	1.0	0	0	0	0	1	3	1.09
2025-06-12	Rocket City Trash Pandas	Pensacola Blue Wahoos	0	0	0.00	1	0	1.0	0	0	0	0	0	0	0.00
2025-06-17	Pensacola Blue Wahoos	Montgomery Biscuits	0	0	3.86	1	0	1.1	2	1	1	0	1	4	1.29
2025-06-20	Pensacola Blue Wahoos	Montgomery Biscuits	0	1	4.15	1	0	2.0	2	2	1	0	2	2	1.62
2025-06-24	Chattanooga Lookouts	Pensacola Blue Wahoos	0	0	4.50	1	0	1.2	1	1	1	0	2	1	1.67
June	Pensacola Blue Wahoos		0	1	4.50	4	0	6.0	5	4	3	0	5	7	1.67
June	Beloit Sky Carp		0	0	0.00	2	1	2.1	0	0	0	0	1	6	0.43
2025-07-02	Pensacola Blue Wahoos	Biloxi Shuckers	1	0	3.86	1	0	1.0	0	0	0	0	2	2	1.71
2025-07-05	Biloxi Shuckers	Pensacola Blue Wahoos	0	0	3.24	1	0	1.1	2	0	0	0	2	0	1.92
2025-07-09	Columbus Clingstones	Pensacola Blue Wahoos	1	0	2.61	1	0	2.0	0	0	0	0	1	3	1.65
2025-07-11	Columbus Clingstones	Pensacola Blue Wahoos	0	0	2.38	1	0	1.0	1	0	0	0	0	1	1.59
2025-07-19	Pensacola Blue Wahoos	Chattanooga Lookouts	0	0	2.03	1	0	2.0	1	0	0	0	1	2	1.50
2025-07-22	Knoxville Smokies	Pensacola Blue Wahoos	0	0	1.76	1	0	2.0	0	0	0	0	1	3	1.37
2025-07-24	Knoxville Smokies	Pensacola Blue Wahoos	1	0	1.62	1	0	1.1	1	0	0	0	0	3	1.32
2025-07-26	Knoxville Smokies	Pensacola Blue Wahoos	0	0	1.45	1	0	2.0	1	0	0	0	0	2	1.23
July	Pensacola Blue Wahoos		3	0	0.00	8	0	12.2	6	0	0	0	7	16	1.03
2025-08-01	Pensacola Blue Wahoos	Biloxi Shuckers	0	0	1.33	1	0	1.2	0	0	0	0	0	2	1.13
2025-08-03	Pensacola Blue Wahoos	Biloxi Shuckers	0	0	1.27	1	0	1.0	0	0	0	0	0	2	1.08
2025-08-07	Montgomery Biscuits	Pensacola Blue Wahoos	0	0	1.23	1	0	0.2	0	0	0	0	0	1	1.05
2025-08-09	Montgomery Biscuits	Pensacola Blue Wahoos	0	0	1.13	1	0	2.0	0	0	0	0	3	3	1.08
2025-08-12	Jacksonville Jumbo Shrimp	Norfolk Tides	0	0	13.50	1	0	0.2	1	1	1	1	0	0	1.50
2025-08-14	Jacksonville Jumbo Shrimp	Norfolk Tides	0	0	5.40	1	0	1.0	0	0	0	0	1	3	1.20
2025-08-17	Jacksonville Jumbo Shrimp	Norfolk Tides	0	0	3.38	1	0	1.0	0	0	0	0	1	1	1.13
2025-08-22	Worcester Red Sox	Jacksonville Jumbo Shrimp	1	0	2.45	1	0	1.0	0	0	0	0	1	3	1.09
2025-08-24	Worcester Red Sox	Jacksonville Jumbo Shrimp	0	0	1.93	1	0	1.0	0	0	0	0	2	1	1.29
2025-08-26	Jacksonville Jumbo Shrimp	Rochester Red Wings	0	0	4.05	1	0	2.0	3	2	2	1	1	1	1.50
2025-08-28	Jacksonville Jumbo Shrimp	Rochester Red Wings	0	0	3.86	1	1	0.1	0	0	0	0	0	1	1.43
August	Jacksonville Jumbo Shrimp		1	0	3.86	7	1	7.0	4	3	3	2	6	10	1.43
August	Pensacola Blue Wahoos		0	0	0.00	4	0	5.1	0	0	0	0	3	8	0.56
2025-09-02	Charlotte Knights	Jacksonville Jumbo Shrimp	0	0	3.00	1	0	2.0	1	0	0	0	0	4	1.22
2025-09-06	Charlotte Knights	Jacksonville Jumbo Shrimp	1	0	2.38	1	0	2.1	2	0	0	0	1	3	1.24
2025-09-10	Jacksonville Jumbo Shrimp	Memphis Redbirds	0	0	2.19	1	0	1.0	0	0	0	0	1	1	1.22
2025-09-13	Jacksonville Jumbo Shrimp	Memphis Redbirds	1	0	1.76	1	0	3.0	0	0	0	0	3	4	1.17
2025-09-19	Norfolk Tides	Jacksonville Jumbo Shrimp	0	0	2.81	1	0	0.2	0	2	2	0	2	1	1.25
2025-09-21	Norfolk Tides	Jacksonville Jumbo Shrimp	0	0	2.65	1	0	1.0	1	0	0	0	2	2	1.35
September	Jacksonville Jumbo Shrimp		2	0	1.80	6	0	10.0	4	2	2	0	9	15	1.30

Standard MLB Batting Statistics

Standard MLB Pitching Statistics

Standard MLB Fielding Statistics

Spray Chart

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Standard Minor League Batting Statistics

Standard Minor League Pitching Statistics

Standard Minor League Fielding Statistics

Transactions

Platoon Splits

Monthly Splits

Baserunner Splits

Game Type Splits

Outs Splits

Inning Splits