Jim Kaat vs Nolan Ryan: Career Stats Comparison
Nolan Ryan has the better career line of the two, leading 7 of the 8 scored categories on this page (8 further counting totals are shown but not scored). Jim Kaat played 1959–1983 as a pitcher; Nolan Ryan played 1966–1993 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 Nolan Ryan (1966–1993) — they debuted in the 1950s and the 1960s respectively and share 18 seasons. Jim Kaat finished with 283 wins and 2,461 strikeouts; Nolan Ryan finished with 324 wins and 5,714 strikeouts. The table below sets out their careers line by line.
Quick answer
- Who leads the career comparison? Nolan Ryan, in 7 of the 8 scored categories.
- Who had the better ERA? Nolan Ryan, with 3.19 to Jim Kaat's 3.45.
- Who won more games? Nolan Ryan, with 324 to Jim Kaat's 283.
- Who recorded more strikeouts? Nolan Ryan, with 5,714 to Jim Kaat's 2,461.
- Who had the better WHIP? Nolan Ryan, with 1.25 to Jim Kaat's 1.26.
- How many innings did each pitch? Jim Kaat 4,530.1, Nolan Ryan 5,386.0.
- Who threw more shutouts? Nolan Ryan, with 61 to Jim Kaat's 31.
Jim Kaat
Nolan Ryan
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. 8 of the 16 lines below are scored; the other 8 are shown but not scored. Games, starts and innings measure playing time, and losses, walks and hits allowed track how long someone pitched, so they are left unmarked, as is any line where both players are at zero. Rate stats are not era-adjusted, so read them against the run environment each player worked in, or use the PIV card below, which is adjusted.
| Statistic | Jim Kaat | Nolan Ryan |
|---|---|---|
| Wins | 283 | Leads: 324 |
| Losses not scored | 237 | 292 |
| Games not scored | 898 | 807 |
| Games Started not scored | 625 | 773 |
| Complete Games | 180 | Leads: 222 |
| Shutouts | 31 | Leads: 61 |
| Saves not scored | 18 | 3 |
| Strikeouts | 2,461 | Leads: 5,714 |
| Walks not scored | 1,083 | 2,795 |
| Hits Allowed not scored | 4,620 | 3,923 |
| Home Runs Allowed not scored | 395 | 321 |
| Innings Pitched not scored | 4,530.1 | 5,386.0 |
| ERA | 3.45 | Leads: 3.19 |
| WHIP | 1.26 | Leads: 1.25 |
| K/9 | 4.89 | Leads: 9.55 |
| BB/9 | Leads: 2.15 | 4.67 |
PIV Comparison
By PIV (Player Impact Value), Nolan Ryan outpaces Jim Kaat 111,223 to 26,792 — driven by both sides of the ledger: 4,119 PIV per season to 1,072, across 27 seasons to 25. 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)
Nolan Ryan — top 3 seasons by ERA (lower is better)
Verdict
Nolan Ryan leads 7 of the 8 scored categories on the head-to-head card: wins, complete games, shutouts, strikeouts, and others. Jim Kaat leads 1: walks per nine. On the raw scoreboard the edge goes to Nolan Ryan. PIV agrees: Nolan Ryan grades out higher across their careers. Click through to each profile for the full season-by-season breakdown.
Related Matchups
How the Jim Kaat and Nolan Ryan careers compare
The careers of Jim Kaat (1959–1983) and Nolan Ryan (1966–1993) overlapped from 1966 to 1983, so for those seasons they faced the same league conditions. With 898 games against 807 across 25 and 27 PIV seasons, neither player's totals owe much to extra seasons. Where Jim Kaat comes out ahead, it is in walks per nine (2.15 to 4.67). By rate, Jim Kaat struck out 4.89 and walked 2.15 per nine innings; Nolan Ryan struck out 9.55 and walked 4.67. Their roles differ: Jim Kaat split time between starting and relief (625 starts in 898 games); Nolan Ryan was mainly a starter (773 starts in 807 games).
Jim Kaat vs Nolan Ryan: Frequently Asked Questions
- Who was better, Jim Kaat or Nolan Ryan?
- By the career statistics compared on this page, Nolan Ryan leads Jim Kaat in 7 of the 8 scored categories.
- Who had the better ERA?
- Nolan Ryan, with 3.19 to Jim Kaat's 3.45.
- Who won more games?
- Nolan Ryan, with 324 to Jim Kaat's 283.
- Who recorded more strikeouts?
- Nolan Ryan, with 5,714 to Jim Kaat's 2,461.
- Who had the better WHIP?
- Nolan Ryan, with 1.25 to Jim Kaat's 1.26.