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Aroldis Chapman
For pitchers we lead with FIP (Fielding Independent Pitching — what ERA should be if defense were league average; a 4.00 FIP is roughly average), K% and BB% (strikeout and walk rate per batter faced, the most predictive rate stats for future ERA), and BABIP against (around .300 is neutral; lower often means good defense or weak contact, higher can signal bad luck or hard contact allowed). ERA, WHIP, and raw IP are still here — but FIP tends to be the better predictor of next-season performance.
The radar chart below normalizes each metric so that 100 equals league average; anything above the dotted ring means the player is beating the league, and bigger polygons mean broader excellence. For a full glossary with formulas and worked examples, visit the Learn section. If you want to compare this player head-to-head with another, jump to the Matchup tool.
FIP
1.85
BABIP
0.216
K%
33.8
BB%
10.3
FIP: Fielding Independent Pitching — evaluates only pitcher-controlled outcomes
K%: Strikeout rate against opposing batters
BB%: Walk rate against opposing batters
| Season | G | W | L | ERA | IP | SO | BB | WHIP | HR |
|---|---|---|---|---|---|---|---|---|---|
| 2010 | 15 | 2 | 2 | 2.03 | 13.1 | 19 | 5 | 1.05 | 0 |
| 2011 | 54 | 4 | 1 | 3.60 | 50.0 | 71 |
G
18
GS
0
W
0
L
1
ERA
0.51
IP
17.2
SO
23
BB
7
Hits
8
HR
0
WHIP
0.85
SV
12
| Date | Opp | IP | H | R | ER | BB | K | HR | ERA |
|---|---|---|---|---|---|---|---|---|---|
| - | Boston Red Sox | 1.0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.00 |
| - | Boston Red Sox | 1.0 | 0 | 0 | 0 | 0 | 1 | 0 | 0.00 |
| - | Boston Red Sox | 1.0 | 0 | 0 | 0 | 1 | 1 | 0 | 0.00 |
| 41 |
| 1.30 |
| 2 |
| 2012 | 68 | 5 | 5 | 1.51 | 71.2 | 122 | 23 | 0.81 | 4 |
| 2013 | 68 | 4 | 5 | 2.54 | 63.2 | 112 | 29 | 1.04 | 7 |
| 2014 | 54 | 0 | 3 | 2.00 | 54.0 | 106 | 24 | 0.83 | 1 |
| 2015 | 65 | 4 | 4 | 1.63 | 66.1 | 116 | 33 | 1.15 | 3 |
| 2016 | 31 | 3 | 0 | 2.01 | 31.1 | 44 | 8 | 0.89 | 2 |
| 2016 | 28 | 1 | 1 | 1.01 | 26.2 | 46 | 10 | 0.83 | 0 |
| 2016 | 59 | 4 | 1 | 1.55 | 58.0 | 90 | 18 | 0.86 | 2 |
| 2017 | 52 | 4 | 3 | 3.22 | 50.1 | 69 | 20 | 1.13 | 3 |
| 2018 | 55 | 3 | 0 | 2.45 | 51.1 | 93 | 30 | 1.05 | 2 |
| 2019 | 60 | 3 | 2 | 2.21 | 57.0 | 85 | 25 | 1.11 | 3 |
| 2020 | 13 | 1 | 1 | 3.09 | 11.2 | 22 | 4 | 0.86 | 2 |
| 2021 | 61 | 6 | 4 | 3.36 | 56.1 | 97 | 38 | 1.31 | 9 |
| 2022 | 43 | 4 | 4 | 4.46 | 36.1 | 43 | 28 | 1.43 | 4 |
| 2023 | 31 | 4 | 2 | 2.45 | 29.1 | 53 | 20 | 1.23 | 0 |
| 2023 | 30 | 2 | 3 | 3.72 | 29.0 | 50 | 16 | 1.28 | 4 |
| 2023 | 61 | 6 | 5 | 3.09 | 58.1 | 103 | 36 | 1.25 | 4 |
| 2024 | 68 | 5 | 5 | 3.79 | 61.2 | 98 | 39 | 1.35 | 5 |
| 2025 | 67 | 5 | 3 | 1.17 | 61.1 | 85 | 15 | 0.70 | 3 |
| 2026 | 18 | 0 | 1 | 0.51 | 17.2 | 23 | 7 | 0.85 | 0 |
| - | Boston Red Sox | 1.0 | 2 | 1 | 1 | 0 | 1 | 0 | 2.25 |
| - | Boston Red Sox | 1.0 | 0 | 0 | 0 | 1 | 0 | 0 | 0.00 |