Dan Haren vs Corey Kluber: Career Stats Comparison
Dan Haren (2003–2015) and Corey Kluber (2011–2023) — breaking in during the 2000s and the 2010s respectively, so they pitched against very different hitting environments. Dan Haren compiled 153 wins and 2,013 strikeouts; Corey Kluber put up 116 wins and 1,725 strikeouts. The numbers below run them through identical career and rate-stat lenses.
Dan Haren
Corey Kluber
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 | Dan Haren | Corey Kluber |
|---|---|---|
| Wins | 153 | 116 |
| Losses | 131 | 77 |
| Games | 391 | 271 |
| Games Started | 380 | 260 |
| Complete Games | 16 | 18 |
| Shutouts | 6 | 8 |
| Saves | 1 | 1 |
| Strikeouts | 2,013 | 1,725 |
| Walks | 500 | 368 |
| Hits Allowed | 2,357 | 1,486 |
| Home Runs Allowed | 305 | 177 |
| Innings Pitched | 2,419 | 1,641 |
| ERA | 3.75 | 3.44 |
| WHIP | 1.18 | 1.13 |
| K/9 | 7.49 | 9.46 |
| BB/9 | 1.86 | 2.02 |
PIV Comparison
By PIV (Player Impact Value), Corey Kluber outpaces Dan Haren 36,049 to 24,951 — a gap driven primarily by per-season impact (2,773 vs 1,663 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).
Dan Haren — top 3 seasons by ERA (lower is better)
Corey Kluber — 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 Dan Haren 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.