Jim Kaat vs Sandy Koufax: Career Stats Comparison
Jim Kaat has the better career line of the two, leading 8 of the 12 statistical categories compared on this page. Jim Kaat played 1959–1983 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
Jim Kaat (1959–1983) and Sandy Koufax (1955–1966) — both came up during the 1950s, so the matchup is a direct one. Jim Kaat compiled 283 wins and 2,461 strikeouts; Sandy Koufax put up 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 Jim Kaat's 3.45.
- Who won more games? Jim Kaat, with 283 to Sandy Koufax's 165.
- Who recorded more strikeouts? Jim Kaat, with 2,461 to Sandy Koufax's 2,396.
- Who had the better WHIP? Sandy Koufax, with 1.11 to Jim Kaat's 1.26.
- Who pitched more innings? Jim Kaat, with 4,530 to Sandy Koufax's 2,324.
- Who threw more shutouts? Sandy Koufax, with 40 to Jim Kaat's 31.
- Who has the higher career Pitcher PIV? Sandy Koufax, with 63,020 career Pitcher PIV to Jim Kaat's 26,792.
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. 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: compare them with the era in mind, or use the PIV card below, which is.
| Statistic | Jim Kaat | Sandy Koufax |
|---|---|---|
| Wins | Leads: 283 | 165 |
| Losses | 237 | 87 |
| Games | Leads: 898 | 397 |
| Games Started | Leads: 625 | 314 |
| Complete Games | Leads: 180 | 137 |
| Shutouts | 31 | Leads: 40 |
| Saves | Leads: 18 | 9 |
| Strikeouts | Leads: 2,461 | 2,396 |
| Walks | 1,083 | 817 |
| Hits Allowed | 4,620 | 1,754 |
| Home Runs Allowed | 395 | 204 |
| Innings Pitched | Leads: 4,530 | 2,324 |
| ERA | 3.45 | Leads: 2.76 |
| WHIP | 1.26 | Leads: 1.11 |
| K/9 | 4.89 | Leads: 9.28 |
| BB/9 | Leads: 2.15 | 3.16 |
PIV Comparison
By PIV (Player Impact Value), Sandy Koufax outpaces Jim Kaat 63,020 to 26,792 — a gap driven primarily by per-season impact (5,252 vs 957 per year). PIV adjusts each season to league baselines, so it's the cleanest way to compare careers across eras.
Peak Seasons
The best single seasons each player produced, ranked by ERA among qualified workloads (120+ innings).
Jim Kaat — 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 ERA, WHIP, and K/9, while Jim Kaat owns wins, strikeouts, and innings pitched. That doesn't settle the era debate, but on the raw scoreboard the edge goes to Sandy Koufax. PIV agrees: Sandy Koufax grades out higher across their careers. Click through to each profile for the full season-by-season breakdown.
Related Matchups
Jim Kaat vs Sandy Koufax: Frequently Asked Questions
- Who was better, Jim Kaat or Sandy Koufax?
- By the career statistics compared on this page, Jim Kaat leads Sandy Koufax in 8 of 12 categories.
- Who had the better ERA?
- Sandy Koufax, with 2.76 to Jim Kaat's 3.45.
- Who won more games?
- Jim Kaat, with 283 to Sandy Koufax's 165.
- Who recorded more strikeouts?
- Jim Kaat, with 2,461 to Sandy Koufax's 2,396.
- Who had the better WHIP?
- Sandy Koufax, with 1.11 to Jim Kaat's 1.26.