Dennis Eckersley vs Kenley Jansen: Career Stats Comparison
Dennis Eckersley (1975–1998) and Kenley Jansen (2010–present) — breaking in during the 1970s and the 2010s respectively, so they pitched against very different hitting environments. Dennis Eckersley compiled 197 wins and 2,401 strikeouts; Kenley Jansen put up 54 wins and 1,278 strikeouts. The numbers below run them through identical career and rate-stat lenses.
Dennis Eckersley
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 | Dennis Eckersley | Kenley Jansen |
|---|---|---|
| Wins | 197 | 54 |
| Losses | 171 | 40 |
| Games | 1,071 | 933 |
| Games Started | 361 | 0 |
| Complete Games | 100 | 0 |
| Shutouts | 20 | 0 |
| Saves | 390 | 476 |
| Strikeouts | 2,401 | 1,278 |
| Walks | 738 | 282 |
| Hits Allowed | 3,076 | 610 |
| Home Runs Allowed | 347 | 88 |
| Innings Pitched | 3,285 | 927 |
| ERA | 3.50 | 2.57 |
| WHIP | 1.16 | 0.96 |
| K/9 | 6.58 | 12.40 |
| BB/9 | 2.02 | 2.74 |
PIV Comparison
By PIV (Player Impact Value), Dennis Eckersley leads Kenley Jansen 41,139 to 34,863 — a gap driven primarily by per-season impact (1,646 vs 2,179 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).
Dennis Eckersley — top 3 seasons by ERA (lower is better)
Kenley Jansen — top 0 seasons by ERA (lower is better)
Verdict
On the head-to-head card, Dennis Eckersley leads in wins, strikeouts, and innings pitched, while Kenley Jansen owns ERA, WHIP, and K/9. That doesn't settle the era debate, but on the raw scoreboard the edge goes to Dennis Eckersley. PIV agrees: Dennis Eckersley grades out higher across their careers. Click through to each profile for the full season-by-season breakdown.