Lefty Grove 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). Lefty Grove played 1925–1941 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
Lefty Grove (1925–1941) and Tom Seaver (1967–1986) — breaking in during the 1920s and the 1960s respectively, so they pitched against very different hitting environments. Lefty Grove finished with 300 wins and 2,266 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? Tom Seaver, with 2.86 to Lefty Grove's 3.06.
- Who won more games? Tom Seaver, with 311 to Lefty Grove's 300.
- Who recorded more strikeouts? Tom Seaver, with 3,640 to Lefty Grove's 2,266.
- Who had the better WHIP? Tom Seaver, with 1.12 to Lefty Grove's 1.28.
- Who pitched more innings? Tom Seaver, with 4,782.2 to Lefty Grove's 3,940.2.
- Who threw more shutouts? Tom Seaver, with 61 to Lefty Grove's 35.
- Who has the higher career Pitcher PIV? Lefty Grove, with 81,321 career Pitcher PIV to Tom Seaver's 79,192.
Lefty Grove
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 1920s and the 1960s were different run environments, so read them against their eras, or use the PIV card below, which is adjusted.
| Statistic | Lefty Grove | Tom Seaver |
|---|---|---|
| Wins | 300 | Leads: 311 |
| Losses not scored | 141 | 205 |
| Games | 616 | Leads: 656 |
| Games Started | 457 | Leads: 647 |
| Complete Games | Leads: 298 | 231 |
| Shutouts | 35 | Leads: 61 |
| Saves | Leads: 55 | 1 |
| Strikeouts | 2,266 | Leads: 3,640 |
| Walks not scored | 1,187 | 1,390 |
| Hits Allowed not scored | 3,849 | 3,971 |
| Home Runs Allowed not scored | 162 | 380 |
| Innings Pitched | 3,940.2 | Leads: 4,782.2 |
| ERA | 3.06 | Leads: 2.86 |
| WHIP | 1.28 | Leads: 1.12 |
| K/9 | 5.18 | Leads: 6.85 |
| BB/9 | 2.71 | Leads: 2.62 |
PIV Comparison through 2025
By PIV (Player Impact Value), Lefty Grove edges Tom Seaver 81,321 to 79,192 — driven by per-season impact — 4,784 PIV per season to 3,600 — rather than by longevity, since Lefty Grove played 17 seasons to Tom Seaver's 22. 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).
Lefty Grove — 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, ERA, and WHIP, while Lefty Grove owns no headline categories. That doesn't settle the era debate, but on the raw scoreboard the edge goes to Tom Seaver. Note that PIV actually grades Lefty Grove ahead, which means Tom Seaver's edge is partly volume. Click through to each profile for the full season-by-season breakdown.
Related Matchups
How the Lefty Grove and Tom Seaver careers compare
The two careers never overlapped: Lefty Grove's ended in 1941, and Tom Seaver debuted in 1967. With 616 games against 656 across 17 and 22 PIV seasons, neither player's totals owe much to extra seasons. Where Lefty Grove comes out ahead, it is in complete games (298 to 231) and saves (55 to 1). By rate, Lefty Grove struck out 5.18 and walked 2.71 per nine innings; Tom Seaver struck out 6.85 and walked 2.62. Both had the same role: Lefty Grove was mainly a starter (457 starts in 616 games); Tom Seaver was mainly a starter (647 starts in 656 games). In WHIP, Tom Seaver's 1.12 beats Lefty Grove's 1.28.
Lefty Grove vs Tom Seaver: Frequently Asked Questions
- Who was better, Lefty Grove or Tom Seaver?
- By the career statistics compared on this page, Tom Seaver leads Lefty Grove in 10 of the 12 scored categories.
- Who had the better ERA?
- Tom Seaver, with 2.86 to Lefty Grove's 3.06.
- Who won more games?
- Tom Seaver, with 311 to Lefty Grove's 300.
- Who recorded more strikeouts?
- Tom Seaver, with 3,640 to Lefty Grove's 2,266.
- Who had the better WHIP?
- Tom Seaver, with 1.12 to Lefty Grove's 1.28.