Bert Blyleven vs Tom Seaver: Career Stats Comparison
Bert Blyleven (1970–1992) and Tom Seaver (1967–1986) — breaking in during the 1970s and the 1960s respectively, so they pitched against very different hitting environments. Bert Blyleven compiled 287 wins and 3,701 strikeouts; Tom Seaver put up 311 wins and 3,640 strikeouts. The numbers below run them through identical career and rate-stat lenses.
Bert Blyleven
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. For pitchers, lower ERA, WHIP, and BB/9 lead; higher K/9 leads.
| Statistic | Bert Blyleven | Tom Seaver |
|---|---|---|
| Wins | 287 | 311 |
| Losses | 250 | 205 |
| Games | 692 | 656 |
| Games Started | 685 | 647 |
| Complete Games | 242 | 231 |
| Shutouts | 60 | 61 |
| Saves | 0 | 1 |
| Strikeouts | 3,701 | 3,640 |
| Walks | 1,322 | 1,390 |
| Hits Allowed | 4,632 | 3,971 |
| Home Runs Allowed | 430 | 380 |
| Innings Pitched | 4,970 | 4,782 |
| ERA | 3.31 | 2.86 |
| WHIP | 1.20 | 1.12 |
| K/9 | 6.70 | 6.85 |
| BB/9 | 2.39 | 2.62 |
PIV Comparison
By PIV (Player Impact Value), Tom Seaver edges Bert Blyleven 79,192 to 74,910 — a gap driven primarily by per-season impact (3,600 vs 3,121 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).
Bert Blyleven — 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, ERA, WHIP, and K/9, while Bert Blyleven owns strikeouts and innings pitched. 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.