Pitcher · 2026
Aroldis Chapman
- Age
- 38
- B/T
- L/L
- Height
- 6' 4"
- Weight
- 235 lb
- Number
- #44
- Born
- February 28, 1988 in Holguin, Cuba
- MLB debut
- August 31, 2010
- Salary, 2026
- $13M
- dbWAR
- 3.9 3 season(s)
- IP
- 39.2
- ERA
- 2.04
- FIP
- 2.66
- K/9
- 11.3
- FIP−
- 64 100 = avg
Aroldis Chapman is a relief pitcher for the Boston Red Sox. In 2026 he struck out 50 batters over 39.2 innings across 41 appearances, going 2-4. His ERA of 2.04 was 51.1% lower than the league average of 4.18 — the best on his team, and 22nd of 467 among MLB pitchers with 20+ innings. Stripping out defence, his 2.66 FIP suggests that his ERA had some help behind him. He missed bats on 28.6% of swings (15.3% of every pitch he threw), walked 10.7% of the batters he faced and struck out 29.8%. His 0.9 dbWAR is built from that FIP rather than runs allowed, so it credits him for what he controls and not for the defence behind him.
League context
Percentile among qualified pitchers, 2026.
Platoon splits
How left- and right-handed hitters fare against him.
| Split | PA | AB | H | HR | BB | SO | AVG | OBP | SLG | wOBA | K% |
|---|---|---|---|---|---|---|---|---|---|---|---|
| vs LHB | 53 | 44 | 8 | 0 | 7 | 16 | .182 | .308 | .295 | .285 | 30.2% |
| vs RHB | 115 | 104 | 23 | 2 | 11 | 34 | .221 | .296 | .337 | .286 | 29.6% |
Pitch sequencing
What Aroldis Chapman throws in each count, and what he follows each pitch with. Select any cell for the breakdown.
Select a count to see exactly what Aroldis Chapman throws in it.
Pitch arsenal
What he throws, how hard, and how often it misses in 2026.
| Four-Seam Fastball | 237 | 96.9 | 2,429 | 46.8% | 19.0% | |
| Sinker | 228 | 97.9 | 2,455 | 57.0% | 28.9% | |
| Slider | 114 | 85.8 | 2,329 | 53.5% | 42.0% | |
| Splitter | 69 | 90.0 | 1,150 | 50.7% | 37.8% |
Pitching
Standard and advanced, by season.
| Trend | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 41 | 0 | 39.2 | 2 | 4 | 27 | 31 | 9 | 50 | 18 | 2.04 | 2.66 | 1.24 | 11.3 | 4.1 | 49 | 64 | 0.9 | |
| 2025 | 67 | 0 | 61.1 | 5 | 3 | 32 | 28 | 8 | 85 | 15 | 1.17 | 1.73 | 0.70 | 12.5 | 2.2 | 28 | 42 | 2.0 | |
| 2024 | 68 | 0 | 61.2 | 5 | 5 | 14 | 44 | 26 | 98 | 39 | 3.79 | 3.04 | 1.35 | 14.3 | 5.7 | 93 | 74 | 1.0 |
Head to head
Put Aroldis Chapman beside up to three others.
Similar players
Nearest 2026 seasons by command, run prevention and role, on rate statistics rather than totals.
wOBA uses linear weights measured from this season's own play-by-play rather than published constants, and wRC+ is park-adjusted against that same league. dbWAR is our own open implementation — not fWAR or bWAR — and the full derivation, including its simplifications, is on the methodology page.