Robert Stephenson
P | Bats/Throws: R/R | 6' 3" 205LBS | Age: 31
Draft: 2011 | Rd: 1, #27, Cincinnati Reds | Alhambra (CA) HS
W L ERA G GS SV IP SO WHIP
2021 2 1 3.13 49 0 1 46 52 1.30
2022 2 2 5.43 58 0 0 58 55 1.33
2023 3 4 3.10 60 0 1 52.1 77 0.88
8 Seasons 17 20 4.64 271 22 3 364.1 406 1.34
G W-L ERA IP SO WHIP
2021 49 2-1 3.13 46 52 1.30
2022 58 2-2 5.43 58 55 1.33
2023 60 3-4 3.10 52.1 77 0.88
8 Seasons 271 17-20 4.64 364.1 406 1.34
MLB Percentile Rankings
Movement Profile (Induced Break)
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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
2016 23 721 116 9 7.8 5.3 89.8 116.2 17.9 34.5 .263 .461 .381 .357 .388 38.8 18.2 11.2 6.08 5.56
2017 24 1464 242 23 9.5 6.0 89.9 112.1 15.4 38.0 .253 .454 .344 .352 .406 37.2 22.5 13.8 4.68 5.48
2018 25 247 40 4 10.0 6.3 88.4 110.5 15.4 55.0 .290 .512 .428 .387 .425 32.5 17.5 19.0 9.26 6.77
2019 26 1028 156 8 5.1 3.1 87.3 109.8 19.0 34.0 .195 .318 .262 .255 .335 26.8 30.9 9.2 3.76 2.81
2020 27 176 26 6 23.1 14.0 91.2 109.1 26.1 38.5 .240 .593 .495 .376 .514 53.8 30.2 7.0 9.90 6.32
2021 28 767 125 9 7.2 4.6 89.1 110.8 15.4 32.0 .228 .392 .313 .306 .371 36.8 26.4 9.1 3.13 3.95
2022 29 914 177 16 9.0 6.5 90.6 112.3 21.0 36.7 .267 .474 .349 .336 .413 41.8 22.3 5.7 5.43 4.78
2023 30 763 108 14 13.0 7.0 87.0 111.7 19.4 31.5 .180 .353 .243 .257 .385 32.4 38.3 8.0 3.10 2.73
Player 6080 990 89 9.0 5.7 89.2 116.2 18.0 36.0 .235 .420 .326 .318 .391 36.3 25.9 10.2
MLB 7.0 4.8 88.5 122.4 12.3 33.2 .245 .405 .316 .315 .368 36.5 22.2 8.4
! Note: All figures in this table cover the period 2015-present.

Statcast Pitch Arsenal

Stephenson relies on 5 pitches.
Cutter
(41.4%) ,
Slider
(24.1%) ,
Four Seamer
(23.6%) ,
Split Finger
(10.6%) ,
Curveball
(0.3%) ,


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Pitch Tracking



Batted Ball Profile

Season GB % FB % LD % PU % Pull % Straight % Oppo % Weak % Topped % Under % Flare/Burner % Solid % Barrel % Barrel/PA
2016 35.3 23.3 31.0 10.3 43.1 30.2 26.7 2.6 27.6 29.3 25.9 6.9 7.8 5.3
2017 41.3 24.8 26.9 7.0 37.2 42.1 20.7 3.3 27.3 27.7 24.8 4.5 9.5 6.0
2018 32.5 25.0 37.5 5.0 32.5 45.0 22.5 5.0 17.5 35.0 30.0 2.5 10.0 6.3
2019 32.7 31.4 25.6 10.3 41.7 37.8 20.5 2.6 25.6 37.2 20.5 5.8 5.1 3.1
2020 23.1 46.2 15.4 15.4 53.8 34.6 11.5 3.8 19.2 38.5 7.7 7.7 23.1 14.0
2021 39.2 31.2 23.2 6.4 37.6 41.6 20.8 4.0 25.6 28.8 29.6 4.8 7.2 4.6
2022 27.1 34.5 28.2 10.2 36.7 35.0 28.2 2.8 19.2 31.1 27.7 9.6 9.0 6.5
2023 34.3 31.5 21.3 13.0 41.7 30.6 27.8 4.6 25.9 30.6 22.2 3.7 13.0 7.0
Player 34.8 29.5 26.5 9.2 39.3 37.4 23.3 3.3 24.6 31.0 24.8 5.9 9.0 5.7
MLB 44.4 23.8 24.7 7.1 37.2 37.5 25.2 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.

Pitch Movement

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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)
YearPitchTeamHand#MPHVertical
Drop		vs.
Comparable		Horizontal
Break		vs.
Comparable		Vertical
Break		vs. AvgHorizontal
Break		vs. Avg
2023 Slider TB R 184 84.8 39.0 2.3 3.9GLV -1.2 -1.2 2.7 3.9GLV -1.4
2023 Curveball TB R 2 77.2 59.1 2.2 9.7GLV 1.8 -12.6 2.7 9.7GLV 0.8
2023 Cutter TB R 316 88.7 32.0 -4.9 0.9ARM -3.4 2.8 -5.1 0.9ARM -3.5
2023 Split-Finger TB R 81 88.8 25.6 -6.1 12.4ARM 0.5 9.0 -5.7 12.4ARM 1.3
2023 4-Seam Fastball TB R 180 96.8 12.5 1.2 11.6ARM 3.3 16.8 1.0 11.6ARM 4.2
2022 Slider PIT R 462 83.9 41.3 3.4 5.2GLV -0.6 -2.7 4.5 5.2GLV -0.5
2022 Split-Finger PIT R 5 88.1 27.4 -4.0 11.2ARM -0.5 7.7 -3.6 11.2ARM -0.2
2022 Curveball PIT R 10 77.5 56.3 -0.1 11.5GLV 2.9 -10.6 0.7 11.5GLV 2.4
2022 4-Seam Fastball PIT R 437 96.8 14.0 -0.5 11.4ARM 3.2 15.1 -1.1 11.4ARM 4.1
! Note: Years are in reverse order.

Run Values by Pitch Type

Year Pitch Type Team RV/100 Run Value Pitches % PA BA SLG wOBA Whiff% K% PutAway % xBA xSLG xwOBA Hard Hit %
2023 Cutter 3.8 12 316 41.4 82 .101 .253 .151 59.9 51.2 46.2 .121 .245 .159 25.6
2023 Slider 1.7 3 184 24.1 50 .186 .372 .304 42.9 36.0 30.0 .197 .418 .315 46.2
2023 4-Seam Fastball -2.3 -4 180 23.6 47 .300 .575 .419 20.0 21.3 18.9 .287 .585 .415 43.3
2023 Split-Finger 2.3 2 81 10.6 20 .100 .150 .108 42.2 35.0 26.9 .157 .176 .147 0.0
2023 Curveball -5.9 0 2 0.3 -- -- -- -- -- 0.0 -- -- -- --
2022 Slider 0.6 3 462 50.5 122 .170 .357 .264 44.4 39.3 25.5 .176 .345 .257 32.3
2022 4-Seam Fastball -1.9 -8 437 47.8 121 .386 .658 .459 13.2 5.8 8.1 .360 .602 .418 47.7
2022 Curveball 4.1 0 10 1.1 3 .000 .000 .000 0.0 0.0 0.0 .159 .496 .269 33.3
2022 Split-Finger -4.5 0 5 0.5 -- -- -- -- -- 0.0 -- -- -- --
! Note: Years are in reverse order.
! Note: To better align with other values, positive numbers (red) are good, and negative numbers (blue) are poor.

Spin Direction

Year Pitch Type Pitches MPH Active Spin % Total Movement (In.) Spin-Based Observed Deviation
2023 Cutter 311 88.6 19 2.8 11:45 1:00 -75
2023 4-Seam Fastball 179 96.8 95 20.3 1:15 1:15 0
2023 Split-Finger 80 88.8 91 15.2 1:15 2:00 -45
2023 Slider 184 84.8 32 5.4 7:30 8:00 -30
2022 Curveball 10 77.5 71 18.1 7:00 7:30 -30
2022 4-Seam Fastball 437 96.8 99 18.8 1:30 1:15 15
2022 Slider 425 83.9 39 7.4 7:30 7:45 -15
! 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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Swing/Take

Runs
Year Team PA Pitches Heart Shadow Chase Waste All
2016 169 717 -5 6 -6 -6 -10
2017 380 1,460 0 9 -8 -8 -8
2018 60 247 -2 3 -3 -1 -3
2019 252 1,001 3 9 -1 -3 7
2020 43 176 0 -2 -1 -1 -4
2021 197 767 3 9 -7 -4 0
2022 246 914 -3 3 -3 -3 -5
2023 199 763 1 12 3 -4 13
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Plate Discipline

Season Pitches Zone % Zone Swing % Zone Contact % Chase % Chase Contact % Edge % 1st Pitch Strike % Swing % Whiff % Meatball % Meatball Swing %
2016 721 44.9 71.9 85.8 28.2 63.4 39.0 52.9 47.9 20.6 7.4 86.8
2017 1,464 45.6 68.8 77.9 27.5 51.6 42.5 54.6 46.2 29.7 6.9 81.2
2018 247 49.8 65.9 76.5 24.2 66.7 42.5 44.4 44.9 25.2 6.1 86.7
2019 1,028 44.8 69.2 77.1 34.9 34.2 37.9 64.1 50.1 39.4 7.0 81.4
2020 176 46.0 61.7 74.0 37.9 41.7 40.9 58.1 48.9 39.5 4.5 75.0
2021 767 50.5 65.1 80.6 27.6 54.3 42.8 57.4 46.5 27.2 7.7 69.5
2022 914 48.9 71.6 82.8 34.5 50.3 41.6 62.8 52.6 28.1 7.3 80.6
2023 763 46.4 68.1 70.1 41.3 28.4 40.1 68.3 53.7 46.6 8.3 68.3
Player 6,080 46.8 68.7 78.8 31.8 46.0 40.9 59.1 49.0 32.2 7.2 78.4
MLB 48.7 67.0 82.0 28.5 57.8 42.6 61.0 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 		CB
Spin 		Extension
2016 67 73 29 55
2017 14 41 22 15 7 28 2 2 15 57 2 83 49 62 81 57 49
2018 54 72 44
2019 96 94 95 90 91 87 84 80 98 88 32 99 95 76 88 40
2020 74 93 40
2021 90 97 97 42
2022 15 13 4 4 44 51 19 6 17 45 82 69 93 90 87 35
2023 90 85 24
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Expected Home Runs

Adjusted
Year Team Avg HR Trot Actual HR xHR HR-xHR Doubters Mostly Gone No Doubters No Doubter %
2016 23.2 9 7.1 2 4 4 4 44.4
2017 23.1 12 13.1 -1 3 14 4 33.3
2018 23.9 2 2.2 0 0 2 1 50.0
2019 23.4 9 5.6 3 5 5 2 22.2
2020 23.6 8 5.3 3 2 4 2 25.0
2021 23.4 5 5.6 -1 1 3 3 60.0
2022 23.9 10 10.3 0 3 5 7 70.0
2023 25.4 8 7.7 0 1 5 4 50.0
Player 23.7 63 57.1 6 19 42 27 42.9
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.
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Expected Home Runs by Park

Adjusted
Year HR
2016 9 7 6 8 8 6 8 7 7 5 6 9 6 5 7 7 5 6 7 8 8 7 10 8 6 6 8 11 8 7 6
2017 12 14 8 12 13 13 16 15 9 9 11 14 15 14 13 16 11 14 15 12 16 11 17 15 15 10 11 15 17 15 8
2018 2 3 2 2 1 2 2 2 2 2 2 3 3 2 2 3 2 2 2 3 2 2 3 2 2 2 2 3 3 2 2
2019 9 8 5 6 7 5 7 6 3 3 4 7 6 6 4 5 5 4 6 7 6 8 8 6 6 4 4 7 8 5 3
2020 8 5 4 6 5 7 6 6 5 3 4 7 5 4 6 6 5 6 5 6 6 5 8 6 4 5 5 5 6 5 3
2021 5 6 5 6 6 6 6 6 5 5 6 7 5 4 6 6 5 5 6 6 5 6 7 5 5 5 7 6 5 6 5
2022 10 11 7 13 10 11 12 9 7 9 9 13 9 9 11 13 10 9 11 10 10 10 14 11 9 8 13 11 10 10 10
2023 8 6 8 8 9 8 8 7 10 7 7 8 8 7 8 8 7 7 8 9 7 8 9 8 6 6 9 9 8 8 6
Player 63 60 45 61 59 58 65 58 48 43 49 68 57 51 57 64 50 53 60 61 60 57 76 61 53 46 59 67 65 58 43
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.
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Year to Year Changes

Metric 2016 2017 +/-   2018 +/-   2019 +/-   2020 +/-   2021 +/-   2022 +/-   2023 +/-  
Fastball Velocity 93.9 93.7 -0.2 ↓ 93.2 -0.5 ↓ 94.9 1.7 ↑ 94.7 -0.2 ↓ 96.4 1.7 ↑ 96.8 0.4 ↑ 91.6 -5.2 ↓
Offspeed Velocity 85.7 85.0 -0.7 ↓ 84.6 -0.4 ↓ 87.1 2.5 ↑ 86.5 -0.6 ↓ 87.2 0.7 ↑ 88.1 0.9 ↑ 88.8 0.7 ↑
Breaking Velocity 81.4 83.6 2.2 ↑ 83.0 -0.6 ↓ 84.5 1.5 ↑ 83.6 -0.9 ↓ 82.2 -1.4 ↓ 83.8 1.6 ↑ 84.7 0.9 ↑
Exit Velocity 89.8 89.9 0.1 ↑ 88.4 -1.5 ↓ 87.3 -1.1 ↓ 91.2 3.9 ↑ 89.1 -2.1 ↓ 90.6 1.5 ↑ 87.0 -3.6 ↓
Launch Angle 17.9 15.4 -2.5 ↓ 15.4 0.0 19.0 3.6 ↑ 26.1 7.1 ↑ 15.4 -10.7 ↓ 21.0 5.6 ↑ 19.4 -1.6 ↓
Barrel % 7.8 9.5 1.7 ↑ 10.0 0.5 ↑ 5.1 -4.9 ↓ 23.1 18.0 ↑ 7.2 -15.9 ↓ 9.0 1.8 ↑ 13.0 4.0 ↑
Hard Hit % 38.8 37.2 -1.6 ↓ 32.5 -4.7 ↓ 26.8 -5.7 ↓ 53.8 27.0 ↑ 36.8 -17.0 ↓ 41.8 5.0 ↑ 32.4 -9.4 ↓
LA Sweet-Spot % 34.5 38.0 3.5 ↑ 55.0 17.0 ↑ 34.0 -21.0 ↓ 38.5 4.5 ↑ 32.0 -6.5 ↓ 36.7 4.7 ↑ 31.5 -5.2 ↓
xBA .263 .253 -0.010 ↓ .290 0.037 ↑ .195 -0.095 ↓ .240 0.045 ↑ .228 -0.012 ↓ .267 0.039 ↑ .180 -0.087 ↓
BA .279 .256 -0.023 ↓ .340 0.084 ↑ .182 -0.158 ↓ .282 0.100 ↑ .241 -0.041 ↓ .275 0.034 ↑ .165 -0.110 ↓
xwOBA .357 .352 -0.005 ↓ .387 0.035 ↑ .255 -0.132 ↓ .376 0.121 ↑ .306 -0.070 ↓ .336 0.030 ↑ .257 -0.079 ↓
wOBA .381 .344 -0.037 ↓ .428 0.084 ↑ .262 -0.166 ↓ .495 0.233 ↑ .313 -0.182 ↓ .349 0.036 ↑ .243 -0.106 ↓
xSLG .461 .454 -0.007 ↓ .512 0.058 ↑ .318 -0.194 ↓ .593 0.275 ↑ .392 -0.201 ↓ .474 0.082 ↑ .353 -0.121 ↓
SLG .517 .445 -0.072 ↓ .580 0.135 ↑ .377 -0.203 ↓ .897 0.520 ↑ .408 -0.489 ↓ .502 0.094 ↑ .341 -0.161 ↓
K% 18.2 22.5 4.3 ↑ 17.5 -5.0 ↓ 30.9 13.4 ↑ 30.2 -0.7 ↓ 26.4 -3.8 ↓ 22.3 -4.1 ↓ 38.3 16.0 ↑
BB% 11.2 13.8 2.6 ↑ 19.0 5.2 ↑ 9.2 -9.8 ↓ 7.0 -2.2 ↓ 9.1 2.1 ↑ 5.7 -3.4 ↓ 8.0 2.3 ↑
Swing % 47.9 46.2 -1.7 ↓ 44.9 -1.3 ↓ 50.1 5.2 ↑ 48.9 -1.2 ↓ 46.5 -2.4 ↓ 52.6 6.1 ↑ 53.7 1.1 ↑
Whiff% 20.6 29.7 9.1 ↑ 25.2 -4.5 ↓ 39.4 14.2 ↑ 39.5 0.1 ↑ 27.2 -12.3 ↓ 28.1 0.9 ↑ 46.6 18.5 ↑
In Zone % 44.9 45.6 0.7 ↑ 49.8 4.2 ↑ 44.8 -5.0 ↓ 46.0 1.2 ↑ 50.5 4.5 ↑ 48.9 -1.6 ↓ 46.4 -2.5 ↓
Out of Zone % 55.1 54.4 -0.7 ↓ 50.2 -4.2 ↓ 55.2 5.0 ↑ 54.0 -1.2 ↓ 49.5 -4.5 ↓ 51.1 1.6 ↑ 53.6 2.5 ↑
Out of Zone Swing % 28.2 27.5 -0.7 ↓ 24.2 -3.3 ↓ 34.9 10.7 ↑ 37.9 3.0 ↑ 27.6 -10.3 ↓ 34.5 6.9 ↑ 41.3 6.8 ↑
First Pitch Swing % 27.6 29.9 2.3 ↑ 19.0 -10.9 ↓ 34.4 15.4 ↑ 20.9 -13.5 ↓ 29.9 9.0 ↑ 37.2 7.3 ↑ 35.2 -2.0 ↓
First Pitch Strike % 52.9 54.6 1.7 ↑ 44.4 -10.2 ↓ 64.1 19.7 ↑ 58.1 -6.0 ↓ 57.4 -0.7 ↓ 62.8 5.4 ↑ 68.3 5.5 ↑
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Statcast Fielder Positioning

vs RHHvs LHH
YearAlignment TypePAwOBAPATotal%PATotal%
2016 Shifts 168 .384 83 8 9.6 85 16 18.8
2017 Shifts 380 .344 217 6 2.8 163 23 14.1
2018 Shifts 60 .428 29 0 0.0 31 8 25.8
2019 Shifts 255 .265 143 12 8.4 112 49 43.8
2020 Shifts 43 .495 22 2 9.1 21 21 100.0
2021 Shifts 197 .313 108 4 3.7 89 31 34.8
2022 Shifts 246 .349 133 22 16.5 113 27 23.9
2023 Shades 199 .243 128 22 17.2 71 26 36.6
! 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 EmptyRunners On Base
SeasonTeamPitchesTempoFast %Slow %PitchesTempoFast %Slow %
2016 194 18.7 15.5% 3.6% 124 24.6 2.4% 23.4%
2017 373 18.4 5.6% 2.7% 266 24.1 0.0% 14.3%
2018 52 18.7 7.7% 1.9% 56 23.7 0.0% 7.1%
2019 285 19.9 2.1% 3.5% 132 23.5 0.0% 8.3%
2020 67 19.8 0.0% 0.0% 11 21.3 0.0% 9.1%
2021 168 22.8 0.0% 8.9% 176 27.1 0.0% 24.4%
2022 222 21.0 0.0% 5.9% 142 24.0 0.0% 14.8%
2023 179 16.0 24.6% 0.6% 101 18.3 6.9% 1.0%

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Pitch Distribution

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