Edwin Diaz vs Josh Hader: Career Stats Comparison
Josh Hader has the better career line of the two, leading 5 of the 12 scored categories on this page (4 further counting totals are shown but not scored). Edwin Diaz has played 2016–present as a pitcher; Josh Hader has played 2017–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
Edwin Diaz (2016–present) and Josh Hader (2017–present) — both came up during the 2010s, so the matchup is a direct one. Edwin Diaz has 30 wins and 867 strikeouts through October 6, 2026; Josh Hader has 38 wins and 884 strikeouts through October 6, 2026. The numbers below run them through identical career and rate-stat lenses.
Quick answer
- Who had the better ERA? Josh Hader, with 2.50 to Edwin Diaz's 3.03.
- Who won more games? Josh Hader, with 38 to Edwin Diaz's 30.
- Who recorded more strikeouts? Josh Hader, with 884 to Edwin Diaz's 867.
- Who had the better WHIP? Josh Hader, with 0.92 to Edwin Diaz's 1.07.
- Who pitched more innings? Josh Hader, with 557.0 to Edwin Diaz's 538.0.
- 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 Josh Hader's 17,542.
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.
Edwin Diaz and Josh Hader are still active — their totals below are current through October 6, 2026.
| Statistic | Edwin Diaz | Josh Hader |
|---|---|---|
| Wins | 30 | Leads: 38 |
| Losses not scored | 38 | 33 |
| Games | Leads: 541 | 513 |
| Games Started | 0 | 0 |
| Complete Games | 0 | 0 |
| Shutouts | 0 | 0 |
| Saves | Leads: 260 | 253 |
| Strikeouts | 867 | Leads: 884 |
| Walks not scored | 193 | 213 |
| Hits Allowed not scored | 382 | 301 |
| Home Runs Allowed not scored | 57 | 66 |
| Innings Pitched | 538.0 | Leads: 557.0 |
| ERA | 3.03 | Leads: 2.50 |
| WHIP | 1.07 | Leads: 0.92 |
| K/9 | Leads: 14.50 | 14.28 |
| BB/9 | Leads: 3.23 | 3.44 |
PIV Comparison through 2025
By PIV (Player Impact Value), Edwin Diaz leads Josh Hader 21,805 to 17,542 — driven by per-season impact — 2,423 PIV per season to 1,754 — rather than by longevity, since Edwin Diaz played 9 seasons to Josh Hader's 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).
Edwin Diaz
No seasons meet the qualifying workload, so there is no peak-season list to show.
Josh Hader
No seasons meet the qualifying workload, so there is no peak-season list to show.
Verdict
On the head-to-head card, Josh Hader leads in wins, strikeouts, ERA, and WHIP, while Edwin Diaz owns K/9. That doesn't settle the era debate, but on the raw scoreboard the edge goes to Josh Hader. Note that PIV actually grades Edwin Diaz ahead, which means Josh Hader's edge is partly volume. Click through to each profile for the full season-by-season breakdown.
Related Matchups
How the Edwin Diaz and Josh Hader careers compare
Edwin Diaz and Josh Hader are both active, and their careers have run side by side since 2017. With 541 games against 513 across 9 and 10 PIV seasons, neither player's totals owe much to extra seasons. The green cells for Edwin Diaz are games (541 to 513), saves (260 to 253), and strikeouts per nine (14.50 to 14.28). The per-nine rows read 14.50 strikeouts and 3.23 walks for Edwin Diaz, 14.28 and 3.44 for Josh Hader. Both had the same role: Edwin Diaz worked mostly in relief (0 starts in 541 games, 260 saves); Josh Hader worked mostly in relief (0 starts in 513 games, 253 saves). Because Edwin Diaz and Josh Hader are still playing, the totals above will keep moving through the season.
Edwin Diaz vs Josh Hader: Frequently Asked Questions
- Who was better, Edwin Diaz or Josh Hader?
- By the career statistics compared on this page, Josh Hader leads Edwin Diaz in 5 of the 12 scored categories.
- Who had the better ERA?
- Josh Hader, with 2.50 to Edwin Diaz's 3.03.
- Who won more games?
- Josh Hader, with 38 to Edwin Diaz's 30.
- Who recorded more strikeouts?
- Josh Hader, with 884 to Edwin Diaz's 867.
- Who had the better WHIP?
- Josh Hader, with 0.92 to Edwin Diaz's 1.07.