RunsLeft › Pitchers › Aroldis Chapman
Relief Pitcher · Boston Red Sox

Aroldis Chapman

LHP · Throws Left · Age 38Reliever
ERA
1.90
FIP
–
IP
42.2
W-L
2-4
WHIP
1.20
K%
31.3
BB%
11.2
GB%
–
K/9
11.8
HR/9
0.4
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)
No scheduled start today. The model projection and lineup matchup appear on start days.

Four-Seam Fastball

FF · lead pitch

37% of pitches · .370 xwOBA allowed · 213 BIP · where it goes, what it costs

Pitcher Locations
where he throws it · catcher’s view
1%3%3%5%3%2%6%8%6%3%7%13%14%9%1%2%3%2%0%0%3%4%2%0%0%
Rare 0% · Common 10% · Very common 20%+
xwOBA Allowed
damage done by zone · all batters
.704.689.143.389.691.346.198.235.359.539.325.209.377.383.614.334.429.714.379–.698.543.699.689.689
Cold .200 · Avg .310 · Hot .500+
Expected Damage
locations × damage zones
.006.019.005.020.017.008.013.019.022.015.023.026.055.033.007.008.012.011.001–.019.021.014.001.001
Low risk · Average · High-risk zone
Four-Seam Fastball (37% usage) has allowed .370 xwOBA over 213 balls in play — his most-used pitch.

Arsenal

usage × whiff, ranked

4 pitch types · 2,771-pitch sample · 2026/2025/2024 blend, weighted 4/3/1

Four-Seam Fastball FF
37% usage · 23% whiff · .370 xwOBA · 96.9 mph
Sinker SI
33% usage · 28% whiff · .197 xwOBA · 97.9 mph
Slider SL
18% usage · 41% whiff · .185 xwOBA · 85.7 mph
Splitter FS
12% usage · 41% whiff · .176 xwOBA · 89.9 mph
Whiff% Trend
last 8 outings · by pitch · min 5 swings per point
1020307/297/308/18/68/98/158/198/21
Four-Seam FastballSinkerSlider
Hand Splits
K% + xwOBA allowed by batter side · 2026/2025/2024 blend, weighted 4/3/1
SplitK%xwOBASample
vs. LHB32 .228 181
vs. RHB35 .260 479
Live · client-hydrated

Market lines

current pick’em lines by book · updates through the day

Live lines load in your browser.
Live · client-hydrated

DFS picks

today’s picks for this pitcher, probability-sorted · graded nightly

Today’s picks load in your browser.