Aroldis Chapman vs Michael Fulmer: Career Stats Comparison
Aroldis Chapman has the better career line of the two, leading 8 of the 12 scored categories on this page (4 further counting totals are shown but not scored). Aroldis Chapman has played 2010–present as a pitcher; Michael Fulmer has played 2016–present as a pitcher.
- ERA (Earned Run Average):
- Earned runs allowed per nine innings pitched: (ER × 9) ÷ IP. The primary measure of pitching effectiveness.
- W (Wins):
- Games credited to a pitcher whose team took a lead it never surrendered while he was the pitcher of record.
- SO (Strikeouts):
- For a batter, times retired on a third strike; for a pitcher, batters retired on a third strike.
- WHIP (Walks and Hits per Inning Pitched):
- Baserunners allowed per inning: (BB + H) ÷ IP. Under 1.00 is elite.
Data updated
Aroldis Chapman (2010–present) and Michael Fulmer (2016–present) — both came up during the 2010s, so the matchup is a direct one. Aroldis Chapman has 63 wins and 1,402 strikeouts through October 12, 2026; Michael Fulmer has 37 wins and 596 strikeouts through October 12, 2026. The numbers below run them through identical career and rate-stat lenses.
Quick answer
- Who had the better ERA? Aroldis Chapman, with 2.48 to Michael Fulmer's 3.93.
- Who won more games? Aroldis Chapman, with 63 to Michael Fulmer's 37.
- Who recorded more strikeouts? Aroldis Chapman, with 1,402 to Michael Fulmer's 596.
- Who had the better WHIP? Aroldis Chapman, with 1.08 to Michael Fulmer's 1.27.
- Who pitched more innings? Aroldis Chapman, with 873.0 to Michael Fulmer's 693.1.
- Who threw more shutouts? Michael Fulmer, with 1 to Aroldis Chapman's 0.
- Who has the higher career Pitcher PIV? Aroldis Chapman, with 36,308 career Pitcher PIV to Michael Fulmer's 4,091.
Aroldis Chapman
Michael Fulmer
Career Stats Side-by-Side
Every cell below is a career total or career rate. Cells highlighted in green mark the player who leads that line. Lower ERA, WHIP and BB/9 lead; higher K/9 leads. 12 of the 16 lines below are scored; the other 4 are counting totals on which fewer is not an achievement, so no one is awarded them. Totals where fewer is not an achievement -- losses, walks and hits allowed -- are left unmarked, because they track how long someone pitched rather than how well. Rate stats are not era-adjusted, so read them against the run environment each player worked in, or use the PIV card below, which is adjusted.
Aroldis Chapman and Michael Fulmer are still active — their totals below are current through October 12, 2026.
| Statistic | Aroldis Chapman | Michael Fulmer |
|---|---|---|
| Wins | Leads: 63 | 37 |
| Losses not scored | 52 | 51 |
| Games | Leads: 916 | 280 |
| Games Started | 0 | Leads: 90 |
| Complete Games | 0 | Leads: 2 |
| Shutouts | 0 | Leads: 1 |
| Saves | Leads: 402 | 19 |
| Strikeouts | Leads: 1,402 | 596 |
| Walks not scored | 431 | 226 |
| Hits Allowed not scored | 510 | 652 |
| Home Runs Allowed not scored | 57 | 77 |
| Innings Pitched | Leads: 873.0 | 693.1 |
| ERA | Leads: 2.48 | 3.93 |
| WHIP | Leads: 1.08 | 1.27 |
| K/9 | Leads: 14.45 | 7.74 |
| BB/9 | 4.44 | Leads: 2.93 |
PIV Comparison through 2025
By PIV (Player Impact Value), Aroldis Chapman outpaces Michael Fulmer 36,308 to 4,091 — driven by both sides of the ledger: 2,017 PIV per season to 409, across 18 seasons to 10. PIV adjusts each season to league baselines, so it's the cleanest way to compare careers across eras.
PIV is computed through the 2025 season. The career totals on this page include 2026 to date, so PIV does not yet reflect the 2026 season.
Peak Seasons
The best single seasons each player produced, ranked by ERA among qualified workloads (120+ innings).
Aroldis Chapman
No seasons meet the qualifying workload, so there is no peak-season list to show.
Michael Fulmer — top 3 seasons by ERA (lower is better)
Verdict
On the head-to-head card, Aroldis Chapman leads in wins, strikeouts, ERA, and WHIP, while Michael Fulmer owns no headline categories. That doesn't settle the era debate, but on the raw scoreboard the edge goes to Aroldis Chapman. PIV agrees: Aroldis Chapman grades out higher across their careers. Click through to each profile for the full season-by-season breakdown.
Related Matchups
How the Aroldis Chapman and Michael Fulmer careers compare
Aroldis Chapman and Michael Fulmer are both active, and their careers have run side by side since 2016. Playing time explains much of the gap in the counting rows: Aroldis Chapman has appeared in 916 games to Michael Fulmer's 280. Where Michael Fulmer comes out ahead, it is in starts (90 to 0), complete games (2 to 0), and shutouts (1 to 0). The per-nine rows read 14.45 strikeouts and 4.44 walks for Aroldis Chapman, 7.74 and 2.93 for Michael Fulmer. Their roles differ: Aroldis Chapman worked mostly in relief (0 starts in 916 games, 402 saves); Michael Fulmer split time between starting and relief (90 starts in 280 games). Aroldis Chapman and Michael Fulmer's numbers are live and update with each game, so the comparison is a snapshot.
Aroldis Chapman vs Michael Fulmer: Frequently Asked Questions
- Who was better, Aroldis Chapman or Michael Fulmer?
- By the career statistics compared on this page, Aroldis Chapman leads Michael Fulmer in 8 of the 12 scored categories.
- Who had the better ERA?
- Aroldis Chapman, with 2.48 to Michael Fulmer's 3.93.
- Who won more games?
- Aroldis Chapman, with 63 to Michael Fulmer's 37.
- Who recorded more strikeouts?
- Aroldis Chapman, with 1,402 to Michael Fulmer's 596.
- Who had the better WHIP?
- Aroldis Chapman, with 1.08 to Michael Fulmer's 1.27.