Head to head · 2026 pitching
Aroldis Chapman vs Michael Petersen
In 2026 Aroldis Chapman has been worth 0.1 more wins. Both lines are computed from play-by-play on the same constants, so they are measured the same way rather than quoted from two sources.
- Their 2026 seasons were among each other's nearest on rate statistics.
2026 season
| Statistic | Aroldis Chapman | Michael Petersen |
|---|---|---|
| G | 53 | 65 |
| GS | 0 | 0 |
| IP | 51.2 | 65.2 |
| W | 3 | 4 |
| SO | 71 | 81 |
| ERA | 1.92 | 3.02 |
| FIP | 2.50 | 3.13 |
| WHIP | 1.12 | 1.13 |
| K/9 | 12.4 | 11.1 |
| BB/9 | 4.0 | 4.0 |
| FIP− | 60 | 75 |
| WAR | 1.3 | 1.2 |
Postseason
Box-score figures only: October is kept out of the season constants, so there is no wOBA, FIP or dbWAR for it.
| Statistic | Aroldis Chapman | Michael Petersen |
|---|---|---|
| G | 47 | — |
| GS | 0 | — |
| IP | 52.2 | — |
| W | 3 | — |
| SV | 11 | — |
| SO | 76 | — |
| BB | 21 | — |
| ERA | 2.22 | — |
| WHIP | 1.14 | — |
| K/9 | 13.0 | — |
| BB/9 | 3.6 | — |
Career
Totalled over the seasons published here, which is not the same as a whole career: a player who debuted before 2005 begins at 2005, not at his real first game.
| Statistic | Aroldis Chapman | Michael Petersen |
|---|---|---|
| G | 916 | 96 |
| GS | 0 | 0 |
| IP | 873.0 | 103.1 |
| W | 63 | 7 |
| L | 52 | 5 |
| SV | 402 | 1 |
| SO | 1,402 | 112 |
| BB | 431 | 47 |
| ERA | 2.48 | 3.75 |
| WHIP | 1.08 | 1.27 |
| K/9 | 14.5 | 9.8 |
| BB/9 | 4.4 | 4.1 |
| HR/9 | 0.6 | 1.0 |
| WAR | 23.3 | 0.9 |
More head to heads
The same seasons, measured against somebody else.
FIP uses the constant solved from this season’s own runs, and FIP− is park-adjusted against the same league. dbWAR is our own open implementation — not fWAR or bWAR — and the full derivation, including its simplifications, is on the methodology page. To put these two beside a third, the comparison page takes up to four.