Edwin Diaz vs David Robertson: Career Stats Comparison
David Robertson 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; David Robertson played 2008–2025 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 David Robertson (2008–2025) — breaking in during the 2010s and the 2000s respectively, so they pitched against very different hitting environments. Edwin Diaz has 30 wins and 867 strikeouts through October 6, 2026; David Robertson finished with 68 wins and 1,176 strikeouts. The numbers below run them through identical career and rate-stat lenses.
Quick answer
- Who had the better ERA? David Robertson, with 2.93 to Edwin Diaz's 3.03.
- Who won more games? David Robertson, with 68 to Edwin Diaz's 30.
- Who recorded more strikeouts? David Robertson, with 1,176 to Edwin Diaz's 867.
- Who had the better WHIP? Edwin Diaz, with 1.07 to David Robertson's 1.16.
- Who pitched more innings? David Robertson, with 894.1 to Edwin Diaz's 538.0.
- Who threw more shutouts? Neither — both are at 0.
- Who has the higher career Pitcher PIV? David Robertson, with 25,283 career Pitcher PIV to Edwin Diaz's 21,805.
David Robertson
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 2000s 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 6, 2026.
| Statistic | Edwin Diaz | David Robertson |
|---|---|---|
| Wins | 30 | Leads: 68 |
| Losses not scored | 38 | 46 |
| Games | 541 | Leads: 881 |
| Games Started | 0 | Leads: 1 |
| Complete Games | 0 | 0 |
| Shutouts | 0 | 0 |
| Saves | Leads: 260 | 179 |
| Strikeouts | 867 | Leads: 1,176 |
| Walks not scored | 193 | 365 |
| Hits Allowed not scored | 382 | 674 |
| Home Runs Allowed not scored | 57 | 81 |
| Innings Pitched | 538.0 | Leads: 894.1 |
| ERA | 3.03 | Leads: 2.93 |
| WHIP | Leads: 1.07 | 1.16 |
| K/9 | Leads: 14.50 | 11.83 |
| BB/9 | Leads: 3.23 | 3.67 |
PIV Comparison through 2025
By PIV (Player Impact Value), David Robertson leads Edwin Diaz 25,283 to 21,805 — a longevity gap rather than a per-season one: David Robertson played 20 seasons to Edwin Diaz's 9, while Edwin Diaz carries the higher per-season figure (2,423 to 1,264). 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.
David Robertson
No seasons meet the qualifying workload, so there is no peak-season list to show.
Verdict
On the head-to-head card, David Robertson leads in wins, strikeouts, ERA, and innings pitched, while Edwin Diaz owns WHIP and K/9. That doesn't settle the era debate, but on the raw scoreboard the edge goes to David Robertson. PIV agrees: David Robertson 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 David Robertson careers compare
From 2016 through 2025, Edwin Diaz and David Robertson were in the majors together. David Robertson has the far longer record, 881 games against 541 across 9 and 20 PIV seasons, which inflates every career total. Where Edwin Diaz comes out ahead, it is in saves (260 to 179), WHIP (1.07 to 1.16), and strikeouts per nine (14.50 to 11.83). By rate, Edwin Diaz struck out 14.50 and walked 3.23 per nine innings; David Robertson struck out 11.83 and walked 3.67. Edwin Diaz worked mostly in relief (0 starts in 541 games, 260 saves), and David Robertson worked mostly in relief (1 starts in 881 games, 179 saves). Edwin Diaz's numbers are live and update with each game, so the comparison is a snapshot.
Edwin Diaz vs David Robertson: Frequently Asked Questions
- Who was better, Edwin Diaz or David Robertson?
- By the career statistics compared on this page, David Robertson leads Edwin Diaz in 6 of the 12 scored categories.
- Who had the better ERA?
- David Robertson, with 2.93 to Edwin Diaz's 3.03.
- Who won more games?
- David Robertson, with 68 to Edwin Diaz's 30.
- Who recorded more strikeouts?
- David Robertson, with 1,176 to Edwin Diaz's 867.
- Who had the better WHIP?
- Edwin Diaz, with 1.07 to David Robertson's 1.16.