Dan Haren vs Jake Peavy: Career Stats Comparison
Dan Haren has the better career line of the two, leading 8 of the 12 scored categories on this page (4 further counting totals are shown but not scored). Dan Haren played 2003–2015 as a pitcher; Jake Peavy played 2002–2016 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
Dan Haren (2003–2015) and Jake Peavy (2002–2016) — both came up during the 2000s, so the matchup is a direct one. Dan Haren finished with 153 wins and 2,013 strikeouts; Jake Peavy finished with 152 wins and 2,207 strikeouts. The numbers below run them through identical career and rate-stat lenses.
Quick answer
- Who had the better ERA? Jake Peavy, with 3.63 to Dan Haren's 3.75.
- Who won more games? Dan Haren, with 153 to Jake Peavy's 152.
- Who recorded more strikeouts? Jake Peavy, with 2,207 to Dan Haren's 2,013.
- Who had the better WHIP? Dan Haren, with 1.18 to Jake Peavy's 1.20.
- Who pitched more innings? Dan Haren, with 2,419.2 to Jake Peavy's 2,377.0.
- Who threw more shutouts? Neither — both are at 6.
- Who has the higher career Pitcher PIV? Jake Peavy, with 34,745 career Pitcher PIV to Dan Haren's 24,951.
Dan Haren
Jake Peavy
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, so read them against the run environment each player worked in, or use the PIV card below, which is adjusted.
| Statistic | Dan Haren | Jake Peavy |
|---|---|---|
| Wins | Leads: 153 | 152 |
| Losses not scored | 131 | 126 |
| Games | Leads: 391 | 388 |
| Games Started | Leads: 380 | 377 |
| Complete Games | Leads: 16 | 15 |
| Shutouts | 6 | 6 |
| Saves | Leads: 1 | 0 |
| Strikeouts | 2,013 | Leads: 2,207 |
| Walks not scored | 500 | 708 |
| Hits Allowed not scored | 2,357 | 2,134 |
| Home Runs Allowed not scored | 305 | 259 |
| Innings Pitched | Leads: 2,419.2 | 2,377.0 |
| ERA | 3.75 | Leads: 3.63 |
| WHIP | Leads: 1.18 | 1.20 |
| K/9 | 7.49 | Leads: 8.36 |
| BB/9 | Leads: 1.86 | 2.68 |
PIV Comparison through 2025
By PIV (Player Impact Value), Jake Peavy outpaces Dan Haren 34,745 to 24,951 — driven by both sides of the ledger: 1,930 PIV per season to 1,663, across 18 seasons to 15. 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).
Dan Haren — top 3 seasons by ERA (lower is better)
Jake Peavy — top 3 seasons by ERA (lower is better)
Verdict
On the head-to-head card, Jake Peavy leads in strikeouts, ERA, and K/9, while Dan Haren owns wins, WHIP, and innings pitched. That doesn't settle the era debate, but on the raw scoreboard the edge goes to Jake Peavy. PIV agrees: Jake Peavy grades out higher across their careers. Click through to each profile for the full season-by-season breakdown.
Related Matchups
How the Dan Haren and Jake Peavy careers compare
Dan Haren and Jake Peavy were active at the same time between 2003 and 2015. The two careers are close in length, 391 games for Dan Haren and 388 for Jake Peavy across 15 and 18 PIV seasons, so the totals compare on fairly even terms. Where Jake Peavy comes out ahead, it is in strikeouts (2,207 to 2,013), ERA (3.63 to 3.75), and strikeouts per nine (8.36 to 7.49). By rate, Dan Haren struck out 7.49 and walked 1.86 per nine innings; Jake Peavy struck out 8.36 and walked 2.68. Dan Haren was mainly a starter (380 starts in 391 games), and Jake Peavy was mainly a starter (377 starts in 388 games).
Dan Haren vs Jake Peavy: Frequently Asked Questions
- Who was better, Dan Haren or Jake Peavy?
- By the career statistics compared on this page, Dan Haren leads Jake Peavy in 8 of the 12 scored categories.
- Who had the better ERA?
- Jake Peavy, with 3.63 to Dan Haren's 3.75.
- Who won more games?
- Dan Haren, with 153 to Jake Peavy's 152.
- Who recorded more strikeouts?
- Jake Peavy, with 2,207 to Dan Haren's 2,013.
- Who had the better WHIP?
- Dan Haren, with 1.18 to Jake Peavy's 1.20.