Jeff Fassero vs John Wetteland: Career Stats Comparison
Jeff Fassero (1991–2006) and John Wetteland (1989–2000) — breaking in during the 1990s and the 1980s respectively, so they pitched against very different hitting environments. Jeff Fassero compiled 121 wins and 1,643 strikeouts; John Wetteland put up 48 wins and 804 strikeouts. The numbers below run them through identical career and rate-stat lenses.
Jeff Fassero
John Wetteland
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 | Jeff Fassero | John Wetteland |
|---|---|---|
| Wins | 121 | 48 |
| Losses | 124 | 45 |
| Games | 720 | 618 |
| Games Started | 242 | 17 |
| Complete Games | 17 | 0 |
| Shutouts | 2 | 0 |
| Saves | 25 | 330 |
| Strikeouts | 1,643 | 804 |
| Walks | 724 | 252 |
| Hits Allowed | 2,083 | 616 |
| Home Runs Allowed | 214 | 73 |
| Innings Pitched | 2,033 | 765 |
| ERA | 4.11 | 2.93 |
| WHIP | 1.38 | 1.13 |
| K/9 | 7.27 | 9.46 |
| BB/9 | 3.20 | 2.96 |
PIV Comparison
By PIV (Player Impact Value), Jeff Fassero leads John Wetteland 25,161 to 20,366 — a gap driven primarily by per-season impact (1,324 vs 1,697 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).
Jeff Fassero — top 3 seasons by ERA (lower is better)
John Wetteland — top 0 seasons by ERA (lower is better)
Verdict
On the head-to-head card, Jeff Fassero leads in wins, strikeouts, and innings pitched, while John Wetteland owns ERA, WHIP, and K/9. That doesn't settle the era debate, but on the raw scoreboard the edge goes to Jeff Fassero. PIV agrees: Jeff Fassero grades out higher across their careers. Click through to each profile for the full season-by-season breakdown.