Roy Halladay vs Sandy Koufax: Career Stats Comparison
Sandy Koufax has the better career line of the two, leading 7 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; Sandy Koufax played 1955–1966 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 Sandy Koufax (1955–1966) — breaking in during the 1990s and the 1950s respectively, so they pitched against very different hitting environments. Roy Halladay finished with 203 wins and 2,117 strikeouts; Sandy Koufax finished with 165 wins and 2,396 strikeouts. The numbers below run them through identical career and rate-stat lenses.
Quick answer
- Who had the better ERA? Sandy Koufax, with 2.76 to Roy Halladay's 3.38.
- Who won more games? Roy Halladay, with 203 to Sandy Koufax's 165.
- Who recorded more strikeouts? Sandy Koufax, with 2,396 to Roy Halladay's 2,117.
- Who had the better WHIP? Sandy Koufax, with 1.11 to Roy Halladay's 1.18.
- Who pitched more innings? Roy Halladay, with 2,749.1 to Sandy Koufax's 2,324.1.
- Who threw more shutouts? Sandy Koufax, with 40 to Roy Halladay's 20.
- Who has the higher career Pitcher PIV? Roy Halladay, with 66,478 career Pitcher PIV to Sandy Koufax's 63,020.
Roy Halladay
Sandy Koufax
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 1950s were different run environments, so read them against their eras, or use the PIV card below, which is adjusted.
| Statistic | Roy Halladay | Sandy Koufax |
|---|---|---|
| Wins | Leads: 203 | 165 |
| Losses not scored | 105 | 87 |
| Games | Leads: 416 | 397 |
| Games Started | Leads: 390 | 314 |
| Complete Games | 67 | Leads: 137 |
| Shutouts | 20 | Leads: 40 |
| Saves | 1 | Leads: 9 |
| Strikeouts | 2,117 | Leads: 2,396 |
| Walks not scored | 592 | 817 |
| Hits Allowed not scored | 2,646 | 1,754 |
| Home Runs Allowed not scored | 236 | 204 |
| Innings Pitched | Leads: 2,749.1 | 2,324.1 |
| ERA | 3.38 | Leads: 2.76 |
| WHIP | 1.18 | Leads: 1.11 |
| K/9 | 6.93 | Leads: 9.28 |
| BB/9 | Leads: 1.94 | 3.16 |
PIV Comparison through 2025
By PIV (Player Impact Value), Roy Halladay edges Sandy Koufax 66,478 to 63,020 — a longevity gap rather than a per-season one: Roy Halladay played 16 seasons to Sandy Koufax's 12, while Sandy Koufax carries the higher per-season figure (5,252 to 4,155). 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)
Sandy Koufax — top 3 seasons by ERA (lower is better)
Verdict
On the head-to-head card, Sandy Koufax leads in strikeouts, ERA, WHIP, and K/9, while Roy Halladay owns wins and innings pitched. That doesn't settle the era debate, but on the raw scoreboard the edge goes to Sandy Koufax. Note that PIV actually grades Roy Halladay ahead, which means Sandy Koufax's edge is partly volume. Click through to each profile for the full season-by-season breakdown.
Related Matchups
How the Roy Halladay and Sandy Koufax careers compare
The two careers never overlapped: Sandy Koufax's ended in 1966, and Roy Halladay debuted in 1998. The two careers are close in length, 416 games for Roy Halladay and 397 for Sandy Koufax across 16 and 12 PIV seasons, so the totals compare on fairly even terms. The per-nine rows read 6.93 strikeouts and 1.94 walks for Roy Halladay, 9.28 and 3.16 for Sandy Koufax. Roy Halladay was mainly a starter (390 starts in 416 games), and Sandy Koufax was mainly a starter (314 starts in 397 games). Sandy Koufax allowed fewer baserunners, a 1.11 WHIP to Roy Halladay's 1.18.
Roy Halladay vs Sandy Koufax: Frequently Asked Questions
- Who was better, Roy Halladay or Sandy Koufax?
- By the career statistics compared on this page, Sandy Koufax leads Roy Halladay in 7 of the 12 scored categories.
- Who had the better ERA?
- Sandy Koufax, with 2.76 to Roy Halladay's 3.38.
- Who won more games?
- Roy Halladay, with 203 to Sandy Koufax's 165.
- Who recorded more strikeouts?
- Sandy Koufax, with 2,396 to Roy Halladay's 2,117.
- Who had the better WHIP?
- Sandy Koufax, with 1.11 to Roy Halladay's 1.18.