Roy Halladay vs Corey Kluber: Career Stats Comparison
Roy Halladay has the better career line of the two, leading 9 of the 12 scored categories on this page (4 further counting totals are shown but not scored). Roy Halladay played 1998–2013 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
Roy Halladay (1998–2013) and Corey Kluber (2011–2023) — breaking in during the 1990s and the 2010s respectively, so they pitched against very different hitting environments. Roy Halladay finished with 203 wins and 2,117 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? Roy Halladay, with 3.38 to Corey Kluber's 3.44.
- Who won more games? Roy Halladay, with 203 to Corey Kluber's 116.
- Who recorded more strikeouts? Roy Halladay, with 2,117 to Corey Kluber's 1,725.
- Who had the better WHIP? Corey Kluber, with 1.13 to Roy Halladay's 1.18.
- Who pitched more innings? Roy Halladay, with 2,749.1 to Corey Kluber's 1,641.2.
- Who threw more shutouts? Roy Halladay, with 20 to Corey Kluber's 8.
- Who has the higher career Pitcher PIV? Roy Halladay, with 66,478 career Pitcher PIV to Corey Kluber's 36,049.
Roy Halladay
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 1990s and the 2010s were different run environments, so read them against their eras, or use the PIV card below, which is adjusted.
| Statistic | Roy Halladay | Corey Kluber |
|---|---|---|
| Wins | Leads: 203 | 116 |
| Losses not scored | 105 | 77 |
| Games | Leads: 416 | 271 |
| Games Started | Leads: 390 | 260 |
| Complete Games | Leads: 67 | 18 |
| Shutouts | Leads: 20 | 8 |
| Saves | 1 | 1 |
| Strikeouts | Leads: 2,117 | 1,725 |
| Walks not scored | 592 | 368 |
| Hits Allowed not scored | 2,646 | 1,486 |
| Home Runs Allowed not scored | 236 | 177 |
| Innings Pitched | Leads: 2,749.1 | 1,641.2 |
| ERA | Leads: 3.38 | 3.44 |
| WHIP | 1.18 | Leads: 1.13 |
| K/9 | 6.93 | Leads: 9.46 |
| BB/9 | Leads: 1.94 | 2.02 |
PIV Comparison through 2025
By PIV (Player Impact Value), Roy Halladay outpaces Corey Kluber 66,478 to 36,049 — driven by both sides of the ledger: 4,155 PIV per season to 2,773, across 16 seasons to 13. 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).
Roy Halladay — 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, Roy Halladay leads in wins, strikeouts, ERA, and innings pitched, while Corey Kluber owns WHIP and K/9. That doesn't settle the era debate, but on the raw scoreboard the edge goes to Roy Halladay. PIV agrees: Roy Halladay grades out higher across their careers. Click through to each profile for the full season-by-season breakdown.
Related Matchups
How the Roy Halladay and Corey Kluber careers compare
Roy Halladay and Corey Kluber were active at the same time between 2011 and 2013. Roy Halladay has the far longer record, 416 games against 271 across 16 and 13 PIV seasons, which inflates every career total. The green cells for Corey Kluber are WHIP (1.13 to 1.18) and strikeouts per nine (9.46 to 6.93). By rate, Roy Halladay struck out 6.93 and walked 1.94 per nine innings; Corey Kluber struck out 9.46 and walked 2.02. Roy Halladay was mainly a starter (390 starts in 416 games), and Corey Kluber was mainly a starter (260 starts in 271 games). Complete games (67 to 18) show how differently the two eras used starters.
Roy Halladay vs Corey Kluber: Frequently Asked Questions
- Who was better, Roy Halladay or Corey Kluber?
- By the career statistics compared on this page, Roy Halladay leads Corey Kluber in 9 of the 12 scored categories.
- Who had the better ERA?
- Roy Halladay, with 3.38 to Corey Kluber's 3.44.
- Who won more games?
- Roy Halladay, with 203 to Corey Kluber's 116.
- Who recorded more strikeouts?
- Roy Halladay, with 2,117 to Corey Kluber's 1,725.
- Who had the better WHIP?
- Corey Kluber, with 1.13 to Roy Halladay's 1.18.