Justin Masterson
P | Bats/Throws: R/R | 6' 6" 260LBS | Age: 39
Draft: 2006 | Rd: 2, #71, Boston Red Sox | San Diego State
W L ERA G GS SV IP SO WHIP
2013 14 10 3.45 32 29 0 193 195 1.20
2014 7 9 5.88 28 25 0 128.2 116 1.63
2015 4 2 5.61 18 9 0 59.1 49 1.60
8 Seasons 64 74 4.31 258 184 0 1,201 1,004 1.40
G W-L ERA IP SO WHIP
2013 32 14-10 3.45 193 195 1.20
2014 28 7-9 5.88 128.2 116 1.63
2015 18 4-2 5.61 59.1 49 1.60
8 Seasons 258 64-74 4.31 1,201 1,004 1.40
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
2015 30 1010 187 8 4.3 2.9 88.7 112.8 5.2 33.2 .252 .385 .378 .334 .350 35.3 17.9 9.9 5.61 4.71
Player 1010 187 8 4.3 2.9 88.7 112.8 5.2 33.2 .252 .385 .378 .334 .350 35.3 17.9 9.9
MLB 7.0 4.8 88.5 122.4 12.3 33.2 .245 .406 .316 .315 .369 36.5 22.2 8.4
! Note: All figures in this table cover the period 2015-present.

Statcast Pitch Arsenal

Masterson relies on 4 pitches.
Sinker
(37.7%) ,
Slider
(29.4%) ,
Four Seamer
(28.5%) ,
Changeup
(4.4%) ,


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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
2015 52.4 17.6 25.1 4.8 41.7 35.8 22.5 4.3 41.7 20.3 20.9 5.9 4.3 2.9
Player 52.4 17.6 25.1 4.8 41.7 35.8 22.5 4.3 41.7 20.3 20.9 5.9 4.3 2.9
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


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
2015 Slider BOS R 294 79.3 41.4 -2.1 18.1GLV 7.9 3.1 -0.9 18.1GLV 12.1
2015 Changeup BOS R 43 85.5 30.9 -2.8 2.8ARM -11.0 7.3 -0.1 2.8ARM -8.5
2015 4-Seam Fastball BOS R 286 88.1 28.0 -5.7 5.2ARM -1.3 7.8 -8.0 5.2ARM -1.4
2015 Sinker BOS R 377 87.4 37.8 7.2 13.3ARM -1.4 -1.4 10.3 13.3ARM -0.2
! Note: Years are in reverse order.
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Swing/Take

Runs
Year Team PA Pitches Heart Shadow Chase Waste All
2008 399 1,542 11 15 -1 -10 15
2009 556 2,160 2 13 -7 -12 -3
2010 793 3,048 -5 20 -14 -15 -13
2011 903 3,431 29 21 -15 -13 22
2012 904 3,413 11 2 -12 -16 -15
2013 808 3,032 17 18 -8 -14 13
2014 590 2,241 0 -2 -17 -16 -35
2015 273 1,010 2 3 -6 -6 -7
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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 %
2015 1,010 45.0 62.9 89.9 25.8 62.9 38.0 56.0 42.5 19.1 7.5 72.4
Player 1,010 45.0 62.9 89.9 25.8 62.9 38.0 56.0 42.5 19.1 7.5 72.4
MLB 48.7 67.0 82.0 28.5 57.8 42.6 61.0 47.2 24.9 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
2015 18 35 50 59 4 74 70 30 29 33 12 21 14 4 14 82
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Statcast Fielder Positioning

vs RHHvs LHH
YearAlignment TypePAwOBAPATotal%PATotal%
! 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 %
2010 831 13.9 67.5% 1.9% 642 20.3 2.0% 6.2%
2011 948 12.8 75.4% 0.4% 616 20.1 1.6% 3.4%
2012 983 13.1 72.3% 0.6% 621 20.1 3.2% 4.3%
2013 949 13.4 71.7% 0.8% 514 20.5 1.0% 3.9%
2014 613 14.3 62.0% 0.5% 470 20.7 1.1% 3.4%
2015 272 15.1 48.5% 1.1% 238 21.4 5.0% 10.5%

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Pitch Distribution