2025 Stats
W-L
4-2
ERA
0.98
WHIP
0.64
K
81
SV
29
Rest-of-Season Projections
2025 Fantasy Outlook
Control continues to be a major issue for Chapman, who issued 39 free passes over 61.2 innings with the Pirates in 2024. His 14.7 percent walk rate was the worst among qualified relievers, but he still posted an impressive 22.3 K-BB percentage that was a top-25 mark. The veteran southpaw averaged 99.8 miles per hour on his sinker, inducing a 32 percent whiff rate that is consistently near the top of the leaderboard for that pitch type. He struck out 98 batters and racked up 14 saves, proving he can still get the job done in the ninth inning. Chapman, who will turn 37 years old in February, signed a one-year, $10.75 million deal with Boston. He'll be a candidate to close for the Red Sox alongside Liam Hendriks and Justin Slaten. Read Past Outlooks

Rare four-strikeout inning in save
Chapman struck out four in a scoreless and hitless inning to earn the save in Sunday's 7-4 win over the Diamondbacks.
Analysis
Chapman allowed pinch hitter Ildemaro Vargas to reach on a wild pitch, which enabled the Boston closer to pull off a four-strikeout inning. Despite the small mistake, he's now pitched 14.2 consecutive scoreless innings over his last 17 appearances, posting a 21:4 K:BB and 12 saves in that span. He's up to 29 saves this season, putting him one away from reaching 30 for the first time since 2021. He's added a stellar 0.98 ERA, 0.64 WHIP and 81:14 K:BB through 55 innings this season.
Chapman allowed pinch hitter Ildemaro Vargas to reach on a wild pitch, which enabled the Boston closer to pull off a four-strikeout inning. Despite the small mistake, he's now pitched 14.2 consecutive scoreless innings over his last 17 appearances, posting a 21:4 K:BB and 12 saves in that span. He's up to 29 saves this season, putting him one away from reaching 30 for the first time since 2021. He's added a stellar 0.98 ERA, 0.64 WHIP and 81:14 K:BB through 55 innings this season.
Pitching Stats
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2025 MLB Game Log
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Minor League Game Log
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Pitching Appearances Breakdown
Average Pitch Count
13
Last 10 Games
13
Last 5 Games
15
How many pitches does Aroldis Chapman generally throw?
1-10
11-20
21-30
31-40
41-50
51-60
61-70
71-80
81-90
91-100
101-110
111-120
121+
What part of the game does Aroldis Chapman generally pitch?
1st
2nd
3rd
4th
5th
6th
7th
8th
9th
Extra
% Games Reaching Innings Threshold
% Games By Number of Innings Pitched
Left/Right Pitching Splits
Since 2023
-16%
BAA vs RHP
2025
-2%
BAA vs LHP
BAA | K | BB | H | HR | ||||
---|---|---|---|---|---|---|---|---|
Since 2023vs Left | .187 | 60 | 25 | 26 | 2 | |||
Since 2023vs Right | .158 | 222 | 64 | 76 | 10 | |||
2025vs Left | .111 | 22 | 1 | 5 | 1 | |||
2025vs Right | .113 | 59 | 13 | 16 | 2 | |||
2024vs Left | .211 | 21 | 14 | 12 | 1 | |||
2024vs Right | .194 | 77 | 25 | 32 | 4 | |||
2023vs Left | .243 | 17 | 10 | 9 | 0 | |||
2023vs Right | .161 | 86 | 26 | 28 | 4 | |||
More Splits→ | View More Split Stats |
Home/Away Pitching Splits
Since 2023
-23%
ERA on Road
2025
-46%
ERA at Home
ERA | WHIP | IP | K/9 | BB/9 | |||||
---|---|---|---|---|---|---|---|---|---|
Since 2023Home | 2.99 | 1.22 | 93.1 | 14.8 | 4.5 | ||||
Since 2023Away | 2.31 | 0.94 | 81.2 | 14.2 | 4.6 | ||||
2025Home | 0.68 | 0.64 | 26.2 | 12.8 | 2.7 | ||||
2025Away | 1.27 | 0.64 | 28.1 | 13.7 | 1.9 | ||||
2024Home | 5.50 | 1.75 | 34.1 | 16.0 | 6.6 | ||||
2024Away | 1.65 | 0.84 | 27.1 | 12.2 | 4.6 | ||||
2023Home | 2.23 | 1.14 | 32.1 | 15.0 | 3.9 | ||||
2023Away | 4.15 | 1.38 | 26.0 | 17.0 | 7.6 | ||||
More Splits→ | View More Split Stats |
Stat Review
How does Aroldis Chapman compare to other relievers?
This section compares his stats with all relief pitcher seasons from the previous three seasons (minimum 30 innings)*. The bar represents the player's percentile rank. For example, if the bar is halfway across, then the player falls into the 50th percentile for that stat and it would be considered average.
* Exit Velocity, Barrels/BBE %, Balls Hit 95+ MPH %, and Spin Rate are benchmarked against 2019 data (min 30 IP). See here for more exit velocity/barrels stats plus an explanation of current limitations with that data set.
* Exit Velocity, Barrels/BBE %, Balls Hit 95+ MPH %, and Spin Rate are benchmarked against 2019 data (min 30 IP). See here for more exit velocity/barrels stats plus an explanation of current limitations with that data set.
K/BB
5.50K/9
12.8BB/9
2.3HR/9
0.5Fastball
98.9 mphERA
1.00WHIP
0.65BABIP
.193GB/FB
0.93Left On Base
90.9%Exit Velocity
81.9 mphBarrels/BBE
4.1%Spin Rate
2293 rpmBalls Hit 95+ MPH
17.4%Swinging Strike
20.0%Advanced Pitching Stats
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Defensive Stats
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Stats Vs Today's Lineup
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Past Fantasy Outlooks
2024
2023
2022
2021
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2019
2018
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Chapman finished with 100-plus strikeouts for the fifth time in his career, but for the first time since 2015. The veteran showcased increased velocity early in the season, hitting 103.8 mph on the radar gun with his devastating sinker (101.1 mph average) that yielded a 43.3% whiff rate, the league's highest mark for that pitch type. Walks were still an issue, but Chapman still had the third-highest K-BB percentage among qualified relievers at 26.9%. Ultimately, the southpaw proved he was effective enough during his age-35 season to maintain a high-leverage role for both Kansas City and Texas. Chapman only had six saves last year, and it seems unlikely that he will take away closing duties from David Bednar after signing a one-year deal with the Pirates in January. The Cuban Missile can still be an asset in leagues scoring holds, NL-only formats and even deep mixed leagues for his ratios and strikeouts.
More Fantasy News

Secures 28th save
Chapman collected the save in Monday's 6-4 victory over the Guardians, pitching a clean inning with one strikeout.
Analysis
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Up to 27 saves
Chapman earned the save Sunday against the Pirates, striking out two in a perfect ninth inning.
Analysis
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Agrees to contract extension
Chapman and the Red Sox agreed Saturday to a one-year, $13.3 million contract extension with a vesting option for 2027, Francys Romero of BeisbolFR.com reports.
Analysis
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Dominant again for 26th save
Chapman earned the save in Wednesday's 3-2 win over Baltimore, striking out three in a perfect ninth inning.
Analysis
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Shuts door for 25th save
Chapman notched the save in Monday's 4-3 win over Baltimore, tossing a clean ninth inning with no strikeouts.
Analysis
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Latest Fantasy Rumors

Wins accolade in American League
Chapman has been named the American League Reliever of the Month for August, Jason Foster of MLB.com reports.
Analysis
Chapman didn't allow a single hit in any of his 12 outings in August, covering 11 innings. He surrendered only one walk, during an Aug. 19 outing against the Orioles, but other than that, he was perfect. Some additional proff of how unhittable Chapman was in August was that opponents had an average exit velocity of just 84.4 mph when putting the ball in play. Chapman hasn't blown a save since July 23, with his 28 saves this year being his highest total since 2021.
Chapman didn't allow a single hit in any of his 12 outings in August, covering 11 innings. He surrendered only one walk, during an Aug. 19 outing against the Orioles, but other than that, he was perfect. Some additional proff of how unhittable Chapman was in August was that opponents had an average exit velocity of just 84.4 mph when putting the ball in play. Chapman hasn't blown a save since July 23, with his 28 saves this year being his highest total since 2021.