Edwin Diaz vs Kenley Jansen: Career Stats Comparison
Edwin Diaz (2016–present) and Kenley Jansen (2010–present) — both came up during the 2010s, so the matchup is a direct one. Edwin Diaz compiled 28 wins and 839 strikeouts; Kenley Jansen put up 54 wins and 1,278 strikeouts. The numbers below run them through identical career and rate-stat lenses.
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. For pitchers, lower ERA, WHIP, and BB/9 lead; higher K/9 leads.
| Statistic | Edwin Diaz | Kenley Jansen |
|---|---|---|
| Wins | 28 | 54 |
| Losses | 36 | 40 |
| Games | 520 | 933 |
| Games Started | 0 | 0 |
| Complete Games | 0 | 0 |
| Shutouts | 0 | 0 |
| Saves | 253 | 476 |
| Strikeouts | 839 | 1,278 |
| Walks | 182 | 282 |
| Hits Allowed | 356 | 610 |
| Home Runs Allowed | 54 | 88 |
| Innings Pitched | 519 | 927 |
| ERA | 2.82 | 2.57 |
| WHIP | 1.04 | 0.96 |
| K/9 | 14.54 | 12.40 |
| BB/9 | 3.15 | 2.74 |
PIV Comparison
By PIV (Player Impact Value), Kenley Jansen outpaces Edwin Diaz 34,863 to 21,805 — a gap driven primarily by per-season impact (2,179 vs 2,423 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)
Kenley Jansen — top 0 seasons by ERA (lower is better)
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.