Andrew Bailey vs Aroldis Chapman: 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). Andrew Bailey played 2009–2017 as a pitcher; Aroldis Chapman has played 2010–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
Andrew Bailey (2009–2017) and Aroldis Chapman (2010–present) — breaking in during the 2000s and the 2010s respectively, so they pitched against very different hitting environments. Andrew Bailey finished with 16 wins and 276 strikeouts; Aroldis Chapman has 63 wins and 1,402 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 Andrew Bailey's 3.12.
- Who won more games? Aroldis Chapman, with 63 to Andrew Bailey's 16.
- Who recorded more strikeouts? Aroldis Chapman, with 1,402 to Andrew Bailey's 276.
- Who had the better WHIP? Aroldis Chapman, with 1.08 to Andrew Bailey's 1.10.
- Who pitched more innings? Aroldis Chapman, with 873.0 to Andrew Bailey's 274.1.
- Who threw more shutouts? Neither — both are at 0.
- Who has the higher career Pitcher PIV? Aroldis Chapman, with 36,308 career Pitcher PIV to Andrew Bailey's 4,922.
Andrew Bailey
Aroldis Chapman
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, and the 2000s and the 2010s were different run environments, so read them against their eras, or use the PIV card below, which is adjusted.
Aroldis Chapman is still active — his totals below are current through October 12, 2026.
| Statistic | Andrew Bailey | Aroldis Chapman |
|---|---|---|
| Wins | 16 | Leads: 63 |
| Losses not scored | 14 | 52 |
| Games | 265 | Leads: 916 |
| Games Started | 0 | 0 |
| Complete Games | 0 | 0 |
| Shutouts | 0 | 0 |
| Saves | 95 | Leads: 402 |
| Strikeouts | 276 | Leads: 1,402 |
| Walks not scored | 91 | 431 |
| Hits Allowed not scored | 212 | 510 |
| Home Runs Allowed not scored | 29 | 57 |
| Innings Pitched | 274.1 | Leads: 873.0 |
| ERA | 3.12 | Leads: 2.48 |
| WHIP | 1.10 | Leads: 1.08 |
| K/9 | 9.05 | Leads: 14.45 |
| BB/9 | Leads: 2.99 | 4.44 |
PIV Comparison through 2025
By PIV (Player Impact Value), Aroldis Chapman outpaces Andrew Bailey 36,308 to 4,922 — driven by both sides of the ledger: 2,017 PIV per season to 547, across 18 seasons to 9. 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).
Andrew Bailey
No seasons meet the qualifying workload, so there is no peak-season list to show.
Aroldis Chapman
No seasons meet the qualifying workload, so there is no peak-season list to show.
Verdict
On the head-to-head card, Aroldis Chapman leads in wins, strikeouts, ERA, and WHIP, while Andrew Bailey 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 Andrew Bailey and Aroldis Chapman careers compare
Andrew Bailey and Aroldis Chapman were active at the same time between 2010 and 2017. The table compares 265 games of Andrew Bailey with 916 of Aroldis Chapman across 9 and 18 PIV seasons; totals favor the longer career by default. Where Andrew Bailey comes out ahead, it is in walks per nine (2.99 to 4.44). By rate, Andrew Bailey struck out 9.05 and walked 2.99 per nine innings; Aroldis Chapman struck out 14.45 and walked 4.44. Both had the same role: Andrew Bailey worked mostly in relief (0 starts in 265 games, 95 saves); Aroldis Chapman worked mostly in relief (0 starts in 916 games, 402 saves). Aroldis Chapman's numbers are live and update with each game, so the comparison is a snapshot.
Andrew Bailey vs Aroldis Chapman: Frequently Asked Questions
- Who was better, Andrew Bailey or Aroldis Chapman?
- By the career statistics compared on this page, Aroldis Chapman leads Andrew Bailey in 8 of the 12 scored categories.
- Who had the better ERA?
- Aroldis Chapman, with 2.48 to Andrew Bailey's 3.12.
- Who won more games?
- Aroldis Chapman, with 63 to Andrew Bailey's 16.
- Who recorded more strikeouts?
- Aroldis Chapman, with 1,402 to Andrew Bailey's 276.
- Who had the better WHIP?
- Aroldis Chapman, with 1.08 to Andrew Bailey's 1.10.