Aroldis Chapman
Boston Red Sox · No. 44 · P

Aroldis Chapman

6' 4", 235 lbs·Age 38·Bats L / Throws L
↑ HotL5 games
Pitcher archetype· RP· DERIVED
Power / KOverpowering stuff — premium velocity and whiffs, strikeouts in bunches.2015–2026 · 10,319 pitches · 99.2 mph fastball
2026 · 32 G
2.05
ERA
1-3
W-L
30.7
IP
1.21
WHIP
38
SO
14
BB
11.2
K/9
21
SV
The Almanac's Take

Chapman at 38 just turned in the best season of his career, posting a microscopic 1.17 ERA that translates to an ERA+ of 356 — meaning he was more than three times better than league average. For a pitcher who's been elite for over a decade, finding another gear this late in his career defies every aging curve in baseball.

The Cuban flame-thrower has always been about velocity and strikeouts, but his 2025 campaign with Boston represents pure mastery. His 85 strikeouts maintained the dominance that's produced 1,331 career punchouts across 821 innings, while his improved command has pushed his ERA nearly a full run below his career 2.52 mark.

Eight All-Star selections tell the story of sustained excellence, but this latest chapter suggests Chapman isn't just surviving Father Time — he's embarrassing him. The question isn't whether he can maintain this level, but how much longer he wants to prove that elite velocity paired with seasoned guile remains baseball's most lethal combination.

Career Highs
1.17
Best ERA · 2025
6
Most W · 2023
122
Most K · 2012
0.70
Best WHIP · 2025
Career Arc · ERA
21 seasons
Statistical Comps
Last 10 Games
DateIPHERBBSOHRDec
Jul 18100200S
Jul 17100020S
Jul 140.66700010
Jul 12110010W
Jul 9100000S
Jul 5111021S
Jul 3120010S
Jun 28111120BS
Jun 27100110S
Jun 25120100S

Career · Hitting

16 seasons
YearTeamGABHRRBIAVGOPSOPS+
201015000
201154000
201268000
201368100
201454000
201565100
201631000
201628000
201659000
201752000
201855000
201960000
202161000
202331000
202567000
202632000
Career800200

Career · Pitching

21 seasons
YearTeamGIPWLERAERA+SOWHIP
20101513.1222.03191.05
20115450.0413.60711.30
20126871.2551.511220.81
20136863.2452.541121.04
20145454.0032.001060.83
20156566.1441.631161.15
20163131.1302.01440.89
20162826.2111.01460.83
20165958.0411.55900.86
20175250.1433.22691.13
20185551.1302.45931.05
20196057.0322.21851.11
20201311.2113.09220.86
20216156.1643.36971.31
20224336.1444.46431.43
20233129.1422.45531.23
20233029.0233.72501.28
20236158.1653.091031.25
20246861.2553.79981.35
20256761.1531.17850.70
20263230.2132.05381.21
Career1015963.271571562
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 · 10,298 pitches · 2015–2026
-24-12+12+24-24-12+12+24← GLOVE SIDEARM SIDE →HORIZONTAL BREAK (IN)INDUCED VERTICAL BREAK (IN)FFSLSIFSCH
FF · 4-Seam Fastball58.1% · 99.1 mph
SL · Slider22.8% · 86.6 mph
SI · Sinker11.9% · 99.8 mph
FS · Split-Finger5.5% · 90.0 mph
CH · Changeup1.5% · 88.8 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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