Bert Blyleven vs Roger Clemens: Career Stats Comparison
Bert Blyleven (1970–1992) and Roger Clemens (1984–2007) — breaking in during the 1970s and the 1980s respectively, so they pitched against very different hitting environments. Bert Blyleven compiled 287 wins and 3,701 strikeouts; Roger Clemens put up 354 wins and 4,672 strikeouts. The numbers below run them through identical career and rate-stat lenses.
Bert Blyleven
Roger Clemens
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 | Roger Clemens |
|---|---|---|
| Wins | 287 | 354 |
| Losses | 250 | 184 |
| Games | 692 | 709 |
| Games Started | 685 | 707 |
| Complete Games | 242 | 118 |
| Shutouts | 60 | 46 |
| Saves | 0 | 0 |
| Strikeouts | 3,701 | 4,672 |
| Walks | 1,322 | 1,580 |
| Hits Allowed | 4,632 | 4,185 |
| Home Runs Allowed | 430 | 363 |
| Innings Pitched | 4,970 | 4,916 |
| ERA | 3.31 | 3.12 |
| WHIP | 1.20 | 1.17 |
| K/9 | 6.70 | 8.55 |
| BB/9 | 2.39 | 2.89 |
PIV Comparison
By PIV (Player Impact Value), Roger Clemens outpaces Bert Blyleven 146,187 to 74,910 — a gap driven primarily by per-season impact (6,091 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)
Roger Clemens — top 3 seasons by ERA (lower is better)
Verdict
On the head-to-head card, Roger Clemens leads in wins, strikeouts, ERA, and WHIP, while Bert Blyleven owns innings pitched. That doesn't settle the era debate, but on the raw scoreboard the edge goes to Roger Clemens. PIV agrees: Roger Clemens grades out higher across their careers. Click through to each profile for the full season-by-season breakdown.