Jeremy Affeldt
2002–2015 · P

Jeremy Affeldt

6' 4", 225 lbs·Lived to 47·Bats L / Throws L
The Almanac's Take

AI-generated analysis coming soon.

Career Highs
1.73
Best ERA · 2009
8
Most W · 2006
98
Most K · 2003
1.102
Best WHIP · 2014
Career Arc · ERA
14 seasons
Statistical Comps

Career · Pitching

14 seasons
YearTeamGIPWLERAERA+SOWHIP
2002KC3477.7344.6492671.571
2003KC36126.0763.93112981.302
2004KC3876.3344.9590491.611
2005KC4949.7025.2681391.711
2006KC5497.3886.2073481.613
2007COL7559.0433.51127461.356
2008CIN7478.3113.33130801.315
2009SF7462.3221.73249551.171
2010SF5350.0434.1498441.600
2011SF6761.7322.63150541.151
2012SF6763.3122.70149571.263
2013SF3933.7153.74103211.307
2014SF6255.3422.28164411.102
2015SF5235.3225.8667211.613
Career774925.94346720
Pitch Movement Map

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.

LHP · 554 pitches · 2015–2015
-24-12+12+24-24-12+12+24← GLOVE SIDEARM SIDE →HORIZONTAL BREAK (IN)INDUCED VERTICAL BREAK (IN)SICUCH
SI · Sinker67.5% · 91.0 mph
CU · Curveball23.8% · 75.0 mph
CH · Changeup8.7% · 86.7 mph

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.

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