Dan Haren vs Corey Kluber: Career Stats Comparison
Dan Haren has the better career line of the two, leading 6 of the 12 scored categories on this page (4 further counting totals are shown but not scored). Dan Haren played 2003–2015 as a pitcher; Corey Kluber played 2011–2023 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
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 finished with 153 wins and 2,013 strikeouts; Corey Kluber finished with 116 wins and 1,725 strikeouts. The numbers below run them through identical career and rate-stat lenses.
Quick answer
- Who had the better ERA? Corey Kluber, with 3.44 to Dan Haren's 3.75.
- Who won more games? Dan Haren, with 153 to Corey Kluber's 116.
- Who recorded more strikeouts? Dan Haren, with 2,013 to Corey Kluber's 1,725.
- Who had the better WHIP? Corey Kluber, with 1.13 to Dan Haren's 1.18.
- Who pitched more innings? Dan Haren, with 2,419.2 to Corey Kluber's 1,641.2.
- Who threw more shutouts? Corey Kluber, with 8 to Dan Haren's 6.
- Who has the higher career Pitcher PIV? Corey Kluber, with 36,049 career Pitcher PIV to Dan Haren's 24,951.
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. 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, and the 2000s and the 2010s were different run environments, so read them against their eras, or use the PIV card below, which is adjusted.
| Statistic | Dan Haren | Corey Kluber |
|---|---|---|
| Wins | Leads: 153 | 116 |
| Losses not scored | 131 | 77 |
| Games | Leads: 391 | 271 |
| Games Started | Leads: 380 | 260 |
| Complete Games | 16 | Leads: 18 |
| Shutouts | 6 | Leads: 8 |
| Saves | 1 | 1 |
| Strikeouts | Leads: 2,013 | 1,725 |
| Walks not scored | 500 | 368 |
| Hits Allowed not scored | 2,357 | 1,486 |
| Home Runs Allowed not scored | 305 | 177 |
| Innings Pitched | Leads: 2,419.2 | 1,641.2 |
| ERA | 3.75 | Leads: 3.44 |
| WHIP | 1.18 | Leads: 1.13 |
| K/9 | 7.49 | Leads: 9.46 |
| BB/9 | Leads: 1.86 | 2.02 |
PIV Comparison through 2025
By PIV (Player Impact Value), Corey Kluber outpaces Dan Haren 36,049 to 24,951 — driven by per-season impact — 2,773 PIV per season to 1,663 — rather than by longevity, since Corey Kluber played 13 seasons to Dan Haren's 15. 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).
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.
Related Matchups
How the Dan Haren and Corey Kluber careers compare
Dan Haren and Corey Kluber were active at the same time between 2011 and 2015. The two careers are close in length, 391 games for Dan Haren and 271 for Corey Kluber across 15 and 13 PIV seasons, so the totals compare on fairly even terms. By rate, Dan Haren struck out 7.49 and walked 1.86 per nine innings; Corey Kluber struck out 9.46 and walked 2.02. Both had the same role: Dan Haren was mainly a starter (380 starts in 391 games); Corey Kluber was mainly a starter (260 starts in 271 games). Corey Kluber allowed fewer baserunners, a 1.13 WHIP to Dan Haren's 1.18.
Dan Haren vs Corey Kluber: Frequently Asked Questions
- Who was better, Dan Haren or Corey Kluber?
- By the career statistics compared on this page, Dan Haren leads Corey Kluber in 6 of the 12 scored categories.
- Who had the better ERA?
- Corey Kluber, with 3.44 to Dan Haren's 3.75.
- Who won more games?
- Dan Haren, with 153 to Corey Kluber's 116.
- Who recorded more strikeouts?
- Dan Haren, with 2,013 to Corey Kluber's 1,725.
- Who had the better WHIP?
- Corey Kluber, with 1.13 to Dan Haren's 1.18.