Edwin Diaz vs Kenley Jansen: Career Stats Comparison
Kenley Jansen 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). Edwin Diaz has played 2016–present as a pitcher; Kenley Jansen has played 2010–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 Kenley Jansen (2010–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; Kenley Jansen has 58 wins and 1,329 strikeouts through October 6, 2026. The numbers below run them through identical career and rate-stat lenses.
Quick answer
- Who had the better ERA? Kenley Jansen, with 2.60 to Edwin Diaz's 3.03.
- Who won more games? Kenley Jansen, with 58 to Edwin Diaz's 30.
- Who recorded more strikeouts? Kenley Jansen, with 1,329 to Edwin Diaz's 867.
- Who had the better WHIP? Kenley Jansen, with 0.97 to Edwin Diaz's 1.07.
- Who pitched more innings? Kenley Jansen, with 972.1 to Edwin Diaz's 538.0.
- Who threw more shutouts? Neither — both are at 0.
- Who has the higher career Pitcher PIV? Kenley Jansen, with 34,863 career Pitcher PIV to Edwin Diaz's 21,805.
Kenley Jansen
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 Kenley Jansen are still active — their totals below are current through October 6, 2026.
| Statistic | Edwin Diaz | Kenley Jansen |
|---|---|---|
| Wins | 30 | Leads: 58 |
| Losses not scored | 38 | 46 |
| Games | 541 | Leads: 983 |
| Games Started | 0 | 0 |
| Complete Games | 0 | 0 |
| Shutouts | 0 | 0 |
| Saves | 260 | Leads: 498 |
| Strikeouts | 867 | Leads: 1,329 |
| Walks not scored | 193 | 305 |
| Hits Allowed not scored | 382 | 634 |
| Home Runs Allowed not scored | 57 | 95 |
| Innings Pitched | 538.0 | Leads: 972.1 |
| ERA | 3.03 | Leads: 2.60 |
| WHIP | 1.07 | Leads: 0.97 |
| K/9 | Leads: 14.50 | 12.30 |
| BB/9 | 3.23 | Leads: 2.82 |
PIV Comparison through 2025
By PIV (Player Impact Value), Kenley Jansen outpaces Edwin Diaz 34,863 to 21,805 — a longevity gap rather than a per-season one: Kenley Jansen played 16 seasons to Edwin Diaz's 9, while Edwin Diaz carries the higher per-season figure (2,423 to 2,179). 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.
Kenley Jansen
No seasons meet the qualifying workload, so there is no peak-season list to show.
Verdict
On the head-to-head card, Kenley Jansen 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 Kenley Jansen. PIV agrees: Kenley Jansen 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 Kenley Jansen careers compare
Edwin Diaz and Kenley Jansen are both active, and their careers have run side by side since 2016. The table compares 541 games of Edwin Diaz with 983 of Kenley Jansen across 9 and 16 PIV seasons; totals favor the longer career by default. The green cells for Edwin Diaz are strikeouts per nine (14.50 to 12.30). By rate, Edwin Diaz struck out 14.50 and walked 3.23 per nine innings; Kenley Jansen struck out 12.30 and walked 2.82. Edwin Diaz worked mostly in relief (0 starts in 541 games, 260 saves), and Kenley Jansen worked mostly in relief (0 starts in 983 games, 498 saves). In WHIP, Kenley Jansen's 0.97 beats Edwin Diaz's 1.07. Because Edwin Diaz and Kenley Jansen are still playing, the totals above will keep moving through the season.
Edwin Diaz vs Kenley Jansen: Frequently Asked Questions
- Who was better, Edwin Diaz or Kenley Jansen?
- By the career statistics compared on this page, Kenley Jansen leads Edwin Diaz in 8 of the 12 scored categories.
- Who had the better ERA?
- Kenley Jansen, with 2.60 to Edwin Diaz's 3.03.
- Who won more games?
- Kenley Jansen, with 58 to Edwin Diaz's 30.
- Who recorded more strikeouts?
- Kenley Jansen, with 1,329 to Edwin Diaz's 867.
- Who had the better WHIP?
- Kenley Jansen, with 0.97 to Edwin Diaz's 1.07.