Justin Masterson
AI-generated analysis coming soon.
Career · Pitching
8 seasons| Year | Team | G | IP | W | L | ERA | ERA+ | SO | WHIP |
|---|---|---|---|---|---|---|---|---|---|
| 2008 | BOS | 36 | 88.3 | 6 | 5 | 3.16 | 137 | 68 | 1.223 |
| 2009 | BOS | 42 | 129.3 | 4 | 10 | 4.52 | 95 | 119 | 1.454 |
| 2010 | CLE | 34 | 180.0 | 6 | 13 | 4.70 | 87 | 140 | 1.500 |
| 2011 | CLE | 34 | 216.0 | 12 | 10 | 3.21 | 123 | 158 | 1.278 |
| 2012 | CLE | 34 | 206.3 | 11 | 15 | 4.93 | 81 | 159 | 1.454 |
| 2013 | CLE | 32 | 193.0 | 14 | 10 | 3.45 | 112 | 195 | 1.202 |
| 2014 | CLE | 28 | 128.7 | 7 | 9 | 5.88 | 64 | 116 | 1.632 |
| 2015 | BOS | 18 | 59.3 | 4 | 2 | 5.61 | 70 | 49 | 1.601 |
| Career | 258 | 1200.9 | 64 | 74 | — | — | 1004 | — | |
Each pitch type this pitcher throws regularly, placed by how the ball moves — sideways break across, rise or drop down the side. Each dotted ring holds about the middle 85% of the league’s pitches of that type, so a cluster sitting outside its ring is movement most pitchers don’t have.
The dots — a sample of this pitcher’s regular-season pitches, placed by movement: left–right is horizontal break, up–down is induced vertical break (what the pitch does beyond gravity). The view is handedness-neutral — positive break is toward the pitcher’s arm side for lefties and righties alike, so every sinker runs right and every sweeper breaks left, whoever throws it.
The dotted rings — about the middle 85% of where each pitch type lands league-wide (a 2-standard-deviation spread), measured from 7.5 million regular-season pitches since 2015. A cluster sitting well outside its ring is movement most of the league doesn’t get. Spring training and the postseason are excluded.
Matchups, projections, comps — grounded in Lahman, Retrosheet, and Statcast.