Sandy Koufax vs Tom Seaver: Career Stats Comparison
Tom Seaver has the better career line of the two, leading 8 of the 12 scored categories on this page (4 further counting totals are shown but not scored). Sandy Koufax played 1955–1966 as a pitcher; Tom Seaver played 1967–1986 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
Sandy Koufax (1955–1966) and Tom Seaver (1967–1986) — breaking in during the 1950s and the 1960s respectively, so they pitched against very different hitting environments. Sandy Koufax finished with 165 wins and 2,396 strikeouts; Tom Seaver finished with 311 wins and 3,640 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 Tom Seaver's 2.86.
- Who won more games? Tom Seaver, with 311 to Sandy Koufax's 165.
- Who recorded more strikeouts? Tom Seaver, with 3,640 to Sandy Koufax's 2,396.
- Who had the better WHIP? Sandy Koufax, with 1.11 to Tom Seaver's 1.12.
- Who pitched more innings? Tom Seaver, with 4,782.2 to Sandy Koufax's 2,324.1.
- Who threw more shutouts? Tom Seaver, with 61 to Sandy Koufax's 40.
- Who has the higher career Pitcher PIV? Tom Seaver, with 79,192 career Pitcher PIV to Sandy Koufax's 63,020.
Sandy Koufax
Tom Seaver
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 1950s and the 1960s were different run environments, so read them against their eras, or use the PIV card below, which is adjusted.
| Statistic | Sandy Koufax | Tom Seaver |
|---|---|---|
| Wins | 165 | Leads: 311 |
| Losses not scored | 87 | 205 |
| Games | 397 | Leads: 656 |
| Games Started | 314 | Leads: 647 |
| Complete Games | 137 | Leads: 231 |
| Shutouts | 40 | Leads: 61 |
| Saves | Leads: 9 | 1 |
| Strikeouts | 2,396 | Leads: 3,640 |
| Walks not scored | 817 | 1,390 |
| Hits Allowed not scored | 1,754 | 3,971 |
| Home Runs Allowed not scored | 204 | 380 |
| Innings Pitched | 2,324.1 | Leads: 4,782.2 |
| ERA | Leads: 2.76 | 2.86 |
| WHIP | Leads: 1.11 | 1.12 |
| K/9 | Leads: 9.28 | 6.85 |
| BB/9 | 3.16 | Leads: 2.62 |
PIV Comparison through 2025
By PIV (Player Impact Value), Tom Seaver leads Sandy Koufax 79,192 to 63,020 — a longevity gap rather than a per-season one: Tom Seaver played 22 seasons to Sandy Koufax's 12, while Sandy Koufax carries the higher per-season figure (5,252 to 3,600). 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).
Sandy Koufax — top 3 seasons by ERA (lower is better)
Tom Seaver — top 3 seasons by ERA (lower is better)
Verdict
On the head-to-head card, Tom Seaver leads in wins, strikeouts, and innings pitched, while Sandy Koufax owns ERA, WHIP, and K/9. That doesn't settle the era debate, but on the raw scoreboard the edge goes to Tom Seaver. PIV agrees: Tom Seaver grades out higher across their careers. Click through to each profile for the full season-by-season breakdown.
Related Matchups
How the Sandy Koufax and Tom Seaver careers compare
The two careers never overlapped: Sandy Koufax's ended in 1966, and Tom Seaver debuted in 1967. Playing time explains much of the gap in the counting rows: Sandy Koufax appeared in 397 games to Tom Seaver's 656. Sandy Koufax's edges on the table are saves (9 to 1), ERA (2.76 to 2.86), and WHIP (1.11 to 1.12). By rate, Sandy Koufax struck out 9.28 and walked 3.16 per nine innings; Tom Seaver struck out 6.85 and walked 2.62. Sandy Koufax was mainly a starter (314 starts in 397 games), and Tom Seaver was mainly a starter (647 starts in 656 games). Sandy Koufax allowed fewer baserunners, a 1.11 WHIP to Tom Seaver's 1.12.
Sandy Koufax vs Tom Seaver: Frequently Asked Questions
- Who was better, Sandy Koufax or Tom Seaver?
- By the career statistics compared on this page, Tom Seaver leads Sandy Koufax in 8 of the 12 scored categories.
- Who had the better ERA?
- Sandy Koufax, with 2.76 to Tom Seaver's 2.86.
- Who won more games?
- Tom Seaver, with 311 to Sandy Koufax's 165.
- Who recorded more strikeouts?
- Tom Seaver, with 3,640 to Sandy Koufax's 2,396.
- Who had the better WHIP?
- Sandy Koufax, with 1.11 to Tom Seaver's 1.12.