Jerry Koosman vs Steve Rogers: Career Stats Comparison
Jerry Koosman (1967–1985) and Steve Rogers (1973–1985) — breaking in during the 1960s and the 1970s respectively, so they pitched against very different hitting environments. Jerry Koosman compiled 222 wins and 2,556 strikeouts; Steve Rogers put up 158 wins and 1,621 strikeouts. The numbers below run them through identical career and rate-stat lenses.
Jerry Koosman
Steve Rogers
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 | Jerry Koosman | Steve Rogers |
|---|---|---|
| Wins | 222 | 158 |
| Losses | 209 | 152 |
| Games | 612 | 399 |
| Games Started | 527 | 393 |
| Complete Games | 140 | 129 |
| Shutouts | 33 | 37 |
| Saves | 17 | 2 |
| Strikeouts | 2,556 | 1,621 |
| Walks | 1,198 | 876 |
| Hits Allowed | 3,635 | 2,619 |
| Home Runs Allowed | 290 | 151 |
| Innings Pitched | 3,839 | 2,837 |
| ERA | 3.36 | 3.17 |
| WHIP | 1.26 | 1.23 |
| K/9 | 5.99 | 5.14 |
| BB/9 | 2.81 | 2.78 |
PIV Comparison
By PIV (Player Impact Value), Steve Rogers edges Jerry Koosman 44,265 to 42,939 — a gap driven primarily by per-season impact (3,405 vs 2,147 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).
Jerry Koosman — top 3 seasons by ERA (lower is better)
Steve Rogers — top 3 seasons by ERA (lower is better)
Verdict
On the head-to-head card, Jerry Koosman leads in wins, strikeouts, K/9, and innings pitched, while Steve Rogers owns ERA and WHIP. That doesn't settle the era debate, but on the raw scoreboard the edge goes to Jerry Koosman. Note that PIV actually grades Steve Rogers ahead, which means Jerry Koosman's edge is partly volume. Click through to each profile for the full season-by-season breakdown.