Relief Pitcher · Boston Red Sox
Aroldis Chapman
ERA
2.36
FIP
–
IP
26.2
W-L
0-3
WHIP
1.28
K%
30.7
BB%
10.5
GB%
–
K/9
11.8
HR/9
0.3
He was signed by the Boston Red Sox in free agency in December 2024. He made his MLB debut on August 31, 2010.Facts: MLB StatsAPI (people · transactions)
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Four-Seam Fastball
FF · lead pitch37% of pitches · .361 xwOBA allowed · 193 BIP · where it goes, what it costs
Pitcher Locations
where he throws it · catcher’s view
Rare 0% · Common 10% · Very common 20%+
xwOBA Allowed
damage done by zone · all batters
Cold .200 · Avg .310 · Hot .500+
Expected Damage
locations × damage zones
Low risk · Average · High-risk zone
Four-Seam Fastball (37% usage) has allowed .361 xwOBA over 193 balls in play — his most-used pitch.
Arsenal
usage × whiff, ranked4 pitch types · 2,547-pitch sample · 2026/2025/2024 blend, weighted 4/3/1
Whiff% Trend
last 8 outings · by pitch · min 5 swings per point
Four-Seam FastballSinkerSlider
Hand Splits
K% + xwOBA allowed by batter side · 2026/2025/2024 blend, weighted 4/3/1
| Split | K% | xwOBA | Sample |
|---|---|---|---|
| vs. LHB | 34.8 | .217 | 162 |
| vs. RHB | 35 | .260 | 443 |
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Market lines
current pick’em lines by book · updates through the day
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DFS picks
today’s picks for this pitcher, probability-sorted · graded nightly
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