Corey Kluber vs Jon Lester: Career Stats Comparison
Corey Kluber (2011–2023) and Jon Lester (2006–2021) — breaking in during the 2010s and the 2000s respectively, so they pitched against very different hitting environments. Corey Kluber compiled 116 wins and 1,725 strikeouts; Jon Lester put up 200 wins and 2,488 strikeouts. The numbers below run them through identical career and rate-stat lenses.
Corey Kluber
Jon Lester
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 | Corey Kluber | Jon Lester |
|---|---|---|
| Wins | 116 | 200 |
| Losses | 77 | 117 |
| Games | 271 | 452 |
| Games Started | 260 | 451 |
| Complete Games | 18 | 15 |
| Shutouts | 8 | 4 |
| Saves | 1 | 0 |
| Strikeouts | 1,725 | 2,488 |
| Walks | 368 | 892 |
| Hits Allowed | 1,486 | 2,610 |
| Home Runs Allowed | 177 | 294 |
| Innings Pitched | 1,641 | 2,740 |
| ERA | 3.44 | 3.66 |
| WHIP | 1.13 | 1.28 |
| K/9 | 9.46 | 8.17 |
| BB/9 | 2.02 | 2.93 |
PIV Comparison
By PIV (Player Impact Value), Corey Kluber outpaces Jon Lester 36,049 to 26,549 — a gap driven primarily by per-season impact (2,773 vs 1,475 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).
Corey Kluber — top 3 seasons by ERA (lower is better)
Jon Lester — top 3 seasons by ERA (lower is better)
Verdict
On the head-to-head card, Corey Kluber leads in ERA, WHIP, and K/9, while Jon Lester owns wins, strikeouts, and innings pitched. That doesn't settle the era debate, but on the raw scoreboard the edge goes to Corey Kluber. PIV agrees: Corey Kluber grades out higher across their careers. Click through to each profile for the full season-by-season breakdown.