← Boston Red Sox
Aroldis Chapman
Boston Red Sox
RP · #44 · Bats L · Throws L · 6'4" · 235 lb · Age 38 · 17 yrs in MLB
2026 grade
86.1
- Runs prevented
- +9.8
- IP · ERA
- 51.2 · 1.92
- K · BB
- 71 · 23
- Rank
- 29 of 205 relievers
What the grade is made of
Runs each part saves or costs against an average pitcher facing the same batters. Contact counts a quarter for how it turned out, because over a season that's mostly the fielders and luck.
- Strikeouts71 vs 47 avg+6.5
- Home runs allowed3 vs 6 avg+4.8
- Walks23 vs 18 avg−1.5
- Contact allowed (how it turned out counts a quarter)113 vs 137 avg−0.9
- Hit batters1 vs 2 avg+0.5
- Parks pitched in+0.5
2026 game log: pitching
Game grades need 3 batters faced; starts are ranked against starts, relief outings against relief outings.
| Game | Result | Dec | IP | H | R | ER | BB | K | HR | PC | Grade |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Wed, Sep 30@NYYPostseason | L 2-9 | 1.0 | 0 | 0 | 0 | 0 | 3 | 0 | 14 | 77.3 | |
| Wed, Sep 23vsCLE | W 1-0 | S | 1.0 | 0 | 0 | 0 | 0 | 3 | 0 | 12 | 86.3 |
| Sun, Sep 13vsKC | W 4-1 | S | 1.0 | 0 | 0 | 0 | 2 | 3 | 0 | 25 | 48.5 |
| Sat, Sep 12vsKC | W 5-1 | 1.0 | 0 | 0 | 0 | 1 | 0 | 0 | 16 | 65.9 | |
| Sun, Sep 6@BAL | W 3-1 | S | 1.0 | 1 | 0 | 0 | 0 | 2 | 0 | 19 | 54.9 |
| Fri, Sep 4@BAL | W 1-0 | S | 1.0 | 0 | 0 | 0 | 0 | 1 | 0 | 11 | 75.5 |
| Thu, Sep 3@BAL | W 6-5 | S | 1.0 | 2 | 2 | 2 | 0 | 2 | 1 | 13 | 12.3 |
| Mon, Aug 31vsSEA | W 9-8 | W | 1.0 | 0 | 0 | 0 | 0 | 2 | 0 | 15 | 67.2 |
| Mon, Aug 24@MIA | W 4-2 | S | 1.0 | 1 | 0 | 0 | 0 | 1 | 0 | 18 | 58.6 |
| Sun, Aug 23vsSF | W 5-4 | S | 1.0 | 0 | 0 | 0 | 0 | 1 | 0 | 15 | 86.7 |
| Fri, Aug 21vsSF | W 6-4 | S | 1.0 | 0 | 0 | 0 | 1 | 3 | 0 | 20 | 65.6 |
| Wed, Aug 19vsARI | L 6-7 | 1.0 | 0 | 0 | 0 | 1 | 1 | 0 | 14 | 65.7 | |
| Sat, Aug 15@PIT | W 4-0 | 1.0 | 0 | 0 | 0 | 0 | 2 | 0 | 15 | 83.7 | |
| Sun, Aug 9vsATH | L 3-4 | L | 1.0 | 2 | 1 | 1 | 1 | 0 | 0 | 23 | 18.3 |
| Thu, Aug 6vsCHW | W 12-11 | 1.0 | 1 | 2 | 1 | 0 | 0 | 1 | 18 | 23.2 | |
| Sat, Aug 1@LAD | W 3-2 | S | 1.0 | 0 | 0 | 0 | 0 | 1 | 0 | 11 | 76.1 |
| Thu, Jul 30@ATH | W 5-4 | S | 1.0 | 1 | 0 | 0 | 0 | 2 | 0 | 11 | 44.0 |
| Wed, Jul 29@ATH | W 4-2 | W | 1.0 | 1 | 0 | 0 | 0 | 2 | 0 | 14 | 33.8 |
| Mon, Jul 27@ATH | W 4-2 | S | 1.0 | 1 | 0 | 0 | 0 | 3 | 0 | 24 | 68.7 |
| Fri, Jul 24vsTOR | W 6-4 | S | 1.0 | 0 | 0 | 0 | 1 | 2 | 0 | 23 | 66.2 |
| Wed, Jul 22vsBAL | W 6-3 | S | 1.0 | 1 | 0 | 0 | 1 | 0 | 0 | 13 | 32.9 |
| Mon, Jul 20vsBAL | W 6-5 | S | 1.0 | 1 | 0 | 0 | 1 | 2 | 0 | 22 | 32.0 |
| Sat, Jul 18vsTB | W 7-6 | S | 1.0 | 0 | 0 | 0 | 2 | 0 | 0 | 20 | 48.7 |
| Fri, Jul 17vsTB | W 5-3 | S | 1.0 | 0 | 0 | 0 | 0 | 2 | 0 | 13 | 88.5 |
| Sun, Jul 12@NYM | W 3-2 | W | 1.0 | 1 | 0 | 0 | 0 | 1 | 0 | 15 | 55.6 |
| Thu, Jul 9@CHW | W 2-1 | S | 1.0 | 0 | 0 | 0 | 0 | 0 | 0 | 9 | 77.9 |
| Sun, Jul 5@LAA | W 7-5 | S | 1.0 | 1 | 1 | 1 | 0 | 2 | 1 | 13 | 22.7 |
| Fri, Jul 3@LAA | W 5-2 | S | 1.0 | 2 | 0 | 0 | 0 | 1 | 0 | 13 | 28.0 |
| Sun, Jun 28vsNYY | W 5-4 | B | 1.0 | 1 | 2 | 1 | 1 | 2 | 0 | 23 | 52.6 |
| Sat, Jun 27vsNYY | W 4-1 | S | 1.0 | 0 | 0 | 0 | 1 | 1 | 0 | 20 | 65.9 |
| Thu, Jun 25vsNYY | W 6-3 | S | 1.0 | 2 | 0 | 0 | 1 | 0 | 0 | 23 | 25.9 |
| Mon, Jun 22@COL | L 2-3 | L | 0.0 | 4 | 3 | 3 | 0 | 0 | 0 | 8 | 2.2 |
| Thu, Jun 18vsTOR | L 3-4 | L | 1.0 | 2 | 1 | 1 | 0 | 1 | 0 | 20 | 27.6 |
| Sat, Jun 13vsTEX | W 6-3 | S | 1.0 | 1 | 0 | 0 | 0 | 2 | 0 | 15 | 58.1 |
| Fri, Jun 5@NYY | W 5-3 | S | 1.0 | 0 | 0 | 0 | 2 | 1 | 0 | 16 | 47.4 |
| Sun, May 31@CLE | W 9-4 | 1.0 | 1 | 0 | 0 | 0 | 2 | 0 | 13 | 54.4 | |
| Wed, May 20@KC | W 4-3 | S | 1.0 | 1 | 0 | 0 | 0 | 1 | 0 | 16 | 57.8 |
| Mon, May 18@KC | W 3-1 | S | 1.0 | 0 | 0 | 0 | 0 | 1 | 0 | 14 | 83.7 |
| Sat, May 16@ATL | W 3-2 | S | 1.0 | 0 | 0 | 0 | 2 | 0 | 0 | 20 | 60.3 |
| Fri, May 15@ATL | L 2-3 | 1.0 | 0 | 0 | 0 | 0 | 2 | 0 | 10 | 73.5 | |
| Wed, May 13vsPHI | W 3-1 | S | 1.0 | 0 | 0 | 0 | 2 | 3 | 0 | 22 | 48.2 |
| Fri, May 8vsTB | W 2-0 | S | 1.0 | 0 | 0 | 0 | 0 | 2 | 0 | 18 | 83.7 |
| Mon, May 4@DET | W 5-4 | S | 1.0 | 0 | 0 | 0 | 0 | 1 | 0 | 13 | 86.7 |
| Sun, May 3vsHOU | L 1-3 | 1.0 | 1 | 0 | 0 | 0 | 2 | 0 | 17 | 58.8 | |
| Fri, May 1vsHOU | W 3-1 | S | 1.0 | 1 | 0 | 0 | 0 | 1 | 0 | 16 | 43.5 |
| Sun, Apr 26@BAL | W 5-3 | S | 1.0 | 0 | 0 | 0 | 0 | 2 | 0 | 7 | 74.7 |
| Mon, Apr 20vsDET | W 8-6 | S | 0.2 | 1 | 0 | 0 | 0 | 1 | 0 | 13 | 33.6 |
| Fri, Apr 17vsDET | W 1-0 | 1.0 | 2 | 0 | 0 | 1 | 1 | 0 | 16 | 13.6 | |
| Tue, Apr 14@MIN | L 0-6 | 1.0 | 0 | 0 | 0 | 0 | 3 | 0 | 22 | 63.2 | |
| Tue, Apr 7vsMIL | W 3-2 | S | 1.0 | 0 | 0 | 0 | 1 | 0 | 0 | 6 | 51.4 |
| Sat, Apr 4vsSD | L 2-3 | L | 1.0 | 2 | 1 | 1 | 0 | 1 | 0 | 17 | 27.6 |
| Fri, Apr 3vsSD | W 5-2 | S | 1.0 | 0 | 0 | 0 | 1 | 1 | 0 | 21 | 65.8 |
| Sat, Mar 28@CIN | L 5-6 | 1.0 | 0 | 0 | 0 | 0 | 1 | 0 | 9 | 84.7 | |
| Thu, Mar 26@CIN | W 3-0 | S | 1.0 | 0 | 0 | 0 | 0 | 0 | 0 | 11 | 84.7 |
2026 game log: hitting
Game grades need 3 plate appearances.
Scores, box scores and play-by-play from ESPN. The run values and park factors behind the grades were worked out from Retrosheet's play-by-play: the information used here was obtained free of charge from and is copyrighted by Retrosheet. Interested parties may contact Retrosheet at www.retrosheet.org.