Edwin Diaz vs Josh Hader: Career Stats Comparison
Edwin Diaz (2016–present) and Josh Hader (2017–present) — both came up during the 2010s, so the matchup is a direct one. Edwin Diaz compiled 28 wins and 839 strikeouts; Josh Hader put up 34 wins and 829 strikeouts. The numbers below run them through identical career and rate-stat lenses.
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. For pitchers, lower ERA, WHIP, and BB/9 lead; higher K/9 leads.
| Statistic | Edwin Diaz | Josh Hader |
|---|---|---|
| Wins | 28 | 34 |
| Losses | 36 | 31 |
| Games | 520 | 468 |
| Games Started | 0 | 0 |
| Complete Games | 0 | 0 |
| Shutouts | 0 | 0 |
| Saves | 253 | 227 |
| Strikeouts | 839 | 829 |
| Walks | 182 | 198 |
| Hits Allowed | 356 | 282 |
| Home Runs Allowed | 54 | 65 |
| Innings Pitched | 519 | 512 |
| ERA | 2.82 | 2.64 |
| WHIP | 1.04 | 0.94 |
| K/9 | 14.54 | 14.56 |
| BB/9 | 3.15 | 3.48 |
PIV Comparison
By PIV (Player Impact Value), Edwin Diaz leads Josh Hader 21,805 to 17,542 — a gap driven primarily by per-season impact (2,423 vs 1,754 per year). PIV adjusts each season to league baselines, so it's the cleanest way to compare careers across eras.
Peak Seasons
The best single seasons each player produced, ranked by ERA among qualified workloads (120+ innings).
Edwin Diaz — top 0 seasons by ERA (lower is better)
Josh Hader — top 0 seasons by ERA (lower is better)
Verdict
On the head-to-head card, Josh Hader leads in wins, ERA, WHIP, and K/9, while Edwin Diaz owns strikeouts and innings pitched. 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.