Edwin Diaz vs Robb Nen: Career Stats Comparison
Robb Nen has the better career line of the two, leading 6 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; Robb Nen played 1993–2002 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 Robb Nen (1993–2002) — breaking in during the 2010s and the 1990s respectively, so they pitched against very different hitting environments. Edwin Diaz has 30 wins and 867 strikeouts through October 12, 2026; Robb Nen finished with 45 wins and 793 strikeouts. The numbers below run them through identical career and rate-stat lenses.
Quick answer
- Who had the better ERA? Robb Nen, with 2.98 to Edwin Diaz's 3.03.
- Who won more games? Robb Nen, with 45 to Edwin Diaz's 30.
- Who recorded more strikeouts? Edwin Diaz, with 867 to Robb Nen's 793.
- Who had the better WHIP? Edwin Diaz, with 1.07 to Robb Nen's 1.21.
- Who pitched more innings? Robb Nen, with 715.0 to Edwin Diaz's 538.0.
- Who threw more shutouts? Neither — both are at 0.
- Who has the higher career Pitcher PIV? Robb Nen, with 28,255 career Pitcher PIV to Edwin Diaz's 21,805.
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 2010s and the 1990s 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 | Edwin Diaz | Robb Nen |
|---|---|---|
| Wins | 30 | Leads: 45 |
| Losses not scored | 38 | 42 |
| Games | 541 | Leads: 643 |
| Games Started | 0 | Leads: 4 |
| Complete Games | 0 | 0 |
| Shutouts | 0 | 0 |
| Saves | 260 | Leads: 314 |
| Strikeouts | Leads: 867 | 793 |
| Walks not scored | 193 | 260 |
| Hits Allowed not scored | 382 | 607 |
| Home Runs Allowed not scored | 57 | 51 |
| Innings Pitched | 538.0 | Leads: 715.0 |
| ERA | 3.03 | Leads: 2.98 |
| WHIP | Leads: 1.07 | 1.21 |
| K/9 | Leads: 14.50 | 9.98 |
| BB/9 | Leads: 3.23 | 3.27 |
PIV Comparison through 2025
By PIV (Player Impact Value), Robb Nen leads Edwin Diaz 28,255 to 21,805 — driven by both sides of the ledger: 2,569 PIV per season to 2,423, across 11 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).
Edwin Diaz
No seasons meet the qualifying workload, so there is no peak-season list to show.
Robb Nen
No seasons meet the qualifying workload, so there is no peak-season list to show.
Verdict
On the head-to-head card, Robb Nen leads in wins, ERA, and innings pitched, while Edwin Diaz owns strikeouts, WHIP, and K/9. That doesn't settle the era debate, but on the raw scoreboard the edge goes to Robb Nen. PIV agrees: Robb Nen grades out higher across their careers. Click through to each profile for the full season-by-season breakdown.
Related Matchups
How the Edwin Diaz and Robb Nen careers compare
The two careers never overlapped: Robb Nen's ended in 2002, and Edwin Diaz debuted in 2016. With 541 games against 643 across 9 and 11 PIV seasons, neither player's totals owe much to extra seasons. The green cells for Edwin Diaz are strikeouts (867 to 793), WHIP (1.07 to 1.21), and strikeouts per nine (14.50 to 9.98). By rate, Edwin Diaz struck out 14.50 and walked 3.23 per nine innings; Robb Nen struck out 9.98 and walked 3.27. Both had the same role: Edwin Diaz worked mostly in relief (0 starts in 541 games, 260 saves); Robb Nen worked mostly in relief (4 starts in 643 games, 314 saves). Because Edwin Diaz is still playing, the totals above will keep moving through the season.
Edwin Diaz vs Robb Nen: Frequently Asked Questions
- Who was better, Edwin Diaz or Robb Nen?
- By the career statistics compared on this page, Robb Nen leads Edwin Diaz in 6 of the 12 scored categories.
- Who had the better ERA?
- Robb Nen, with 2.98 to Edwin Diaz's 3.03.
- Who won more games?
- Robb Nen, with 45 to Edwin Diaz's 30.
- Who recorded more strikeouts?
- Edwin Diaz, with 867 to Robb Nen's 793.
- Who had the better WHIP?
- Edwin Diaz, with 1.07 to Robb Nen's 1.21.