Jeff Fassero vs John Wetteland: Career Stats Comparison
Jeff Fassero has the better career line of the two, leading 7 of the 12 scored categories on this page (4 further counting totals are shown but not scored). Jeff Fassero played 1991–2006 as a pitcher; John Wetteland played 1989–2000 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
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 finished with 121 wins and 1,643 strikeouts; John Wetteland finished with 48 wins and 804 strikeouts. The numbers below run them through identical career and rate-stat lenses.
Quick answer
- Who had the better ERA? John Wetteland, with 2.93 to Jeff Fassero's 4.11.
- Who won more games? Jeff Fassero, with 121 to John Wetteland's 48.
- Who recorded more strikeouts? Jeff Fassero, with 1,643 to John Wetteland's 804.
- Who had the better WHIP? John Wetteland, with 1.13 to Jeff Fassero's 1.38.
- Who pitched more innings? Jeff Fassero, with 2,033.2 to John Wetteland's 765.0.
- Who threw more shutouts? Jeff Fassero, with 2 to John Wetteland's 0.
- Who has the higher career Pitcher PIV? Jeff Fassero, with 25,161 career Pitcher PIV to John Wetteland's 20,366.
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. 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 1990s and the 1980s were different run environments, so read them against their eras, or use the PIV card below, which is adjusted.
| Statistic | Jeff Fassero | John Wetteland |
|---|---|---|
| Wins | Leads: 121 | 48 |
| Losses not scored | 124 | 45 |
| Games | Leads: 720 | 618 |
| Games Started | Leads: 242 | 17 |
| Complete Games | Leads: 17 | 0 |
| Shutouts | Leads: 2 | 0 |
| Saves | 25 | Leads: 330 |
| Strikeouts | Leads: 1,643 | 804 |
| Walks not scored | 724 | 252 |
| Hits Allowed not scored | 2,083 | 616 |
| Home Runs Allowed not scored | 214 | 73 |
| Innings Pitched | Leads: 2,033.2 | 765.0 |
| ERA | 4.11 | Leads: 2.93 |
| WHIP | 1.38 | Leads: 1.13 |
| K/9 | 7.27 | Leads: 9.46 |
| BB/9 | 3.20 | Leads: 2.96 |
PIV Comparison through 2025
By PIV (Player Impact Value), Jeff Fassero leads John Wetteland 25,161 to 20,366 — a longevity gap rather than a per-season one: Jeff Fassero played 19 seasons to John Wetteland's 12, while John Wetteland carries the higher per-season figure (1,697 to 1,324). 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).
Jeff Fassero — top 3 seasons by ERA (lower is better)
John Wetteland
No seasons meet the qualifying workload, so there is no peak-season list to show.
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.
Related Matchups
How the Jeff Fassero and John Wetteland careers compare
From 1991 through 2000, Jeff Fassero and John Wetteland were in the majors together. The two careers are close in length, 720 games for Jeff Fassero and 618 for John Wetteland across 19 and 12 PIV seasons, so the totals compare on fairly even terms. By rate, Jeff Fassero struck out 7.27 and walked 3.20 per nine innings; John Wetteland struck out 9.46 and walked 2.96. Jeff Fassero split time between starting and relief (242 starts in 720 games), while John Wetteland worked mostly in relief (17 starts in 618 games, 330 saves). In WHIP, John Wetteland's 1.13 beats Jeff Fassero's 1.38.
Jeff Fassero vs John Wetteland: Frequently Asked Questions
- Who was better, Jeff Fassero or John Wetteland?
- By the career statistics compared on this page, Jeff Fassero leads John Wetteland in 7 of the 12 scored categories.
- Who had the better ERA?
- John Wetteland, with 2.93 to Jeff Fassero's 4.11.
- Who won more games?
- Jeff Fassero, with 121 to John Wetteland's 48.
- Who recorded more strikeouts?
- Jeff Fassero, with 1,643 to John Wetteland's 804.
- Who had the better WHIP?
- John Wetteland, with 1.13 to Jeff Fassero's 1.38.