Andrew Bailey vs Edwin Diaz: Career Stats Comparison
Edwin Diaz 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; Edwin Diaz 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
Andrew Bailey (2009–2017) and Edwin Diaz (2016–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; Edwin Diaz has 30 wins and 867 strikeouts through October 12, 2026. The numbers below run them through identical career and rate-stat lenses.
Quick answer
- Who had the better ERA? Edwin Diaz, with 3.03 to Andrew Bailey's 3.12.
- Who won more games? Edwin Diaz, with 30 to Andrew Bailey's 16.
- Who recorded more strikeouts? Edwin Diaz, with 867 to Andrew Bailey's 276.
- Who had the better WHIP? Edwin Diaz, with 1.07 to Andrew Bailey's 1.10.
- Who pitched more innings? Edwin Diaz, with 538.0 to Andrew Bailey's 274.1.
- Who threw more shutouts? Neither — both are at 0.
- Who has the higher career Pitcher PIV? Edwin Diaz, with 21,805 career Pitcher PIV to Andrew Bailey's 4,922.
Andrew Bailey
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.
Edwin Diaz is still active — his totals below are current through October 12, 2026.
| Statistic | Andrew Bailey | Edwin Diaz |
|---|---|---|
| Wins | 16 | Leads: 30 |
| Losses not scored | 14 | 38 |
| Games | 265 | Leads: 541 |
| Games Started | 0 | 0 |
| Complete Games | 0 | 0 |
| Shutouts | 0 | 0 |
| Saves | 95 | Leads: 260 |
| Strikeouts | 276 | Leads: 867 |
| Walks not scored | 91 | 193 |
| Hits Allowed not scored | 212 | 382 |
| Home Runs Allowed not scored | 29 | 57 |
| Innings Pitched | 274.1 | Leads: 538.0 |
| ERA | 3.12 | Leads: 3.03 |
| WHIP | 1.10 | Leads: 1.07 |
| K/9 | 9.05 | Leads: 14.50 |
| BB/9 | Leads: 2.99 | 3.23 |
PIV Comparison through 2025
By PIV (Player Impact Value), Edwin Diaz outpaces Andrew Bailey 21,805 to 4,922 — driven by per-season impact — 2,423 PIV per season to 547 — rather than by longevity, since Edwin Diaz played 9 seasons to Andrew Bailey's 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.
Edwin Diaz
No seasons meet the qualifying workload, so there is no peak-season list to show.
Verdict
On the head-to-head card, Edwin Diaz 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 Edwin Diaz. PIV agrees: Edwin Diaz 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 Edwin Diaz careers compare
The careers of Andrew Bailey (2009–2017) and Edwin Diaz (2016–present) overlapped from 2016 to 2017, so for those seasons they faced the same league conditions. Edwin Diaz has the far longer record, 541 games against 265 across 9 and 9 PIV seasons, which inflates every career total. Where Andrew Bailey comes out ahead, it is in walks per nine (2.99 to 3.23). The per-nine rows read 9.05 strikeouts and 2.99 walks for Andrew Bailey, 14.50 and 3.23 for Edwin Diaz. Both had the same role: Andrew Bailey worked mostly in relief (0 starts in 265 games, 95 saves); Edwin Diaz worked mostly in relief (0 starts in 541 games, 260 saves). Edwin Diaz's numbers are live and update with each game, so the comparison is a snapshot.
Andrew Bailey vs Edwin Diaz: Frequently Asked Questions
- Who was better, Andrew Bailey or Edwin Diaz?
- By the career statistics compared on this page, Edwin Diaz leads Andrew Bailey in 8 of the 12 scored categories.
- Who had the better ERA?
- Edwin Diaz, with 3.03 to Andrew Bailey's 3.12.
- Who won more games?
- Edwin Diaz, with 30 to Andrew Bailey's 16.
- Who recorded more strikeouts?
- Edwin Diaz, with 867 to Andrew Bailey's 276.
- Who had the better WHIP?
- Edwin Diaz, with 1.07 to Andrew Bailey's 1.10.