Sandy Koufax vs Mike Mussina: Career Stats Comparison
Sandy Koufax and Mike Mussina are close to even, splitting the 12 scored categories on this page 6–6 (4 further counting totals are shown but not scored). Sandy Koufax played 1955–1966 as a pitcher; Mike Mussina played 1991–2008 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 Mike Mussina (1991–2008) — breaking in during the 1950s and the 1990s respectively, so they pitched against very different hitting environments. Sandy Koufax finished with 165 wins and 2,396 strikeouts; Mike Mussina finished with 270 wins and 2,813 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 Mike Mussina's 3.68.
- Who won more games? Mike Mussina, with 270 to Sandy Koufax's 165.
- Who recorded more strikeouts? Mike Mussina, with 2,813 to Sandy Koufax's 2,396.
- Who had the better WHIP? Sandy Koufax, with 1.11 to Mike Mussina's 1.19.
- Who pitched more innings? Mike Mussina, with 3,562.2 to Sandy Koufax's 2,324.1.
- Who threw more shutouts? Sandy Koufax, with 40 to Mike Mussina's 23.
- Who has the higher career Pitcher PIV? Mike Mussina, with 76,572 career Pitcher PIV to Sandy Koufax's 63,020.
Sandy Koufax
Mike Mussina
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 1990s were different run environments, so read them against their eras, or use the PIV card below, which is adjusted.
| Statistic | Sandy Koufax | Mike Mussina |
|---|---|---|
| Wins | 165 | Leads: 270 |
| Losses not scored | 87 | 153 |
| Games | 397 | Leads: 537 |
| Games Started | 314 | Leads: 536 |
| Complete Games | Leads: 137 | 57 |
| Shutouts | Leads: 40 | 23 |
| Saves | Leads: 9 | 0 |
| Strikeouts | 2,396 | Leads: 2,813 |
| Walks not scored | 817 | 785 |
| Hits Allowed not scored | 1,754 | 3,460 |
| Home Runs Allowed not scored | 204 | 376 |
| Innings Pitched | 2,324.1 | Leads: 3,562.2 |
| ERA | Leads: 2.76 | 3.68 |
| WHIP | Leads: 1.11 | 1.19 |
| K/9 | Leads: 9.28 | 7.11 |
| BB/9 | 3.16 | Leads: 1.98 |
PIV Comparison through 2025
By PIV (Player Impact Value), Mike Mussina leads Sandy Koufax 76,572 to 63,020 — a longevity gap rather than a per-season one: Mike Mussina played 18 seasons to Sandy Koufax's 12, while Sandy Koufax carries the higher per-season figure (5,252 to 4,254). 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)
Mike Mussina — top 3 seasons by ERA (lower is better)
Verdict
On the head-to-head card, Mike Mussina 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 Mike Mussina. PIV agrees: Mike Mussina 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 Mike Mussina careers compare
Sandy Koufax (1955–1966) was finished before Mike Mussina (1991–2008) arrived, so they never shared a league. The two careers are close in length, 397 games for Sandy Koufax and 537 for Mike Mussina across 12 and 18 PIV seasons, so the totals compare on fairly even terms. By rate, Sandy Koufax struck out 9.28 and walked 3.16 per nine innings; Mike Mussina struck out 7.11 and walked 1.98. Both had the same role: Sandy Koufax was mainly a starter (314 starts in 397 games); Mike Mussina was mainly a starter (536 starts in 537 games). Sandy Koufax allowed fewer baserunners, a 1.11 WHIP to Mike Mussina's 1.19.
Sandy Koufax vs Mike Mussina: Frequently Asked Questions
- Who had the better ERA?
- Sandy Koufax, with 2.76 to Mike Mussina's 3.68.
- Who won more games?
- Mike Mussina, with 270 to Sandy Koufax's 165.
- Who recorded more strikeouts?
- Mike Mussina, with 2,813 to Sandy Koufax's 2,396.
- Who had the better WHIP?
- Sandy Koufax, with 1.11 to Mike Mussina's 1.19.