Andy Messersmith vs Tom Seaver: Career Stats Comparison
Tom Seaver has the better career line of the two, leading 10 of the 12 scored categories on this page (4 further counting totals are shown but not scored). Andy Messersmith played 1968–1979 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
Andy Messersmith (1968–1979) and Tom Seaver (1967–1986) — both came up during the 1960s, so the matchup is a direct one. Andy Messersmith finished with 130 wins and 1,625 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? Neither — both are at 2.86.
- Who won more games? Tom Seaver, with 311 to Andy Messersmith's 130.
- Who recorded more strikeouts? Tom Seaver, with 3,640 to Andy Messersmith's 1,625.
- Who had the better WHIP? Tom Seaver, with 1.12 to Andy Messersmith's 1.14.
- Who pitched more innings? Tom Seaver, with 4,782.2 to Andy Messersmith's 2,230.1.
- Who threw more shutouts? Tom Seaver, with 61 to Andy Messersmith's 27.
- Who has the higher career Pitcher PIV? Tom Seaver, with 79,192 career Pitcher PIV to Andy Messersmith's 19,907.
Andy Messersmith
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, so read them against the run environment each player worked in, or use the PIV card below, which is adjusted.
| Statistic | Andy Messersmith | Tom Seaver |
|---|---|---|
| Wins | 130 | Leads: 311 |
| Losses not scored | 99 | 205 |
| Games | 344 | Leads: 656 |
| Games Started | 295 | Leads: 647 |
| Complete Games | 98 | Leads: 231 |
| Shutouts | 27 | Leads: 61 |
| Saves | Leads: 15 | 1 |
| Strikeouts | 1,625 | Leads: 3,640 |
| Walks not scored | 831 | 1,390 |
| Hits Allowed not scored | 1,719 | 3,971 |
| Home Runs Allowed not scored | 174 | 380 |
| Innings Pitched | 2,230.1 | Leads: 4,782.2 |
| ERA | Leads: 2.86 | 2.86 |
| WHIP | 1.14 | Leads: 1.12 |
| K/9 | 6.56 | Leads: 6.85 |
| BB/9 | 3.35 | Leads: 2.62 |
PIV Comparison through 2025
By PIV (Player Impact Value), Tom Seaver outpaces Andy Messersmith 79,192 to 19,907 — driven by both sides of the ledger: 3,600 PIV per season to 1,659, across 22 seasons to 12. 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).
Andy Messersmith — 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, WHIP, and K/9, while Andy Messersmith owns ERA. 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 Andy Messersmith and Tom Seaver careers compare
Andy Messersmith and Tom Seaver were active at the same time between 1968 and 1979. Playing time explains much of the gap in the counting rows: Andy Messersmith appeared in 344 games to Tom Seaver's 656. Andy Messersmith's edges on the table are saves (15 to 1) and ERA (2.86 to 2.86). The per-nine rows read 6.56 strikeouts and 3.35 walks for Andy Messersmith, 6.85 and 2.62 for Tom Seaver. Both had the same role: Andy Messersmith was mainly a starter (295 starts in 344 games); Tom Seaver was mainly a starter (647 starts in 656 games). In WHIP, Tom Seaver's 1.12 beats Andy Messersmith's 1.14.
Andy Messersmith vs Tom Seaver: Frequently Asked Questions
- Who was better, Andy Messersmith or Tom Seaver?
- By the career statistics compared on this page, Tom Seaver leads Andy Messersmith in 10 of the 12 scored categories.
- Who had the better ERA?
- Neither — both are at 2.86.
- Who won more games?
- Tom Seaver, with 311 to Andy Messersmith's 130.
- Who recorded more strikeouts?
- Tom Seaver, with 3,640 to Andy Messersmith's 1,625.
- Who had the better WHIP?
- Tom Seaver, with 1.12 to Andy Messersmith's 1.14.