Dan Haren vs Roy Oswalt: 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; Roy Oswalt played 2001–2013 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 Roy Oswalt (2001–2013) — both came up during the 2000s, so the matchup is a direct one. Dan Haren finished with 153 wins and 2,013 strikeouts; Roy Oswalt finished with 163 wins and 1,852 strikeouts. The numbers below run them through identical career and rate-stat lenses.
Quick answer
- Who had the better ERA? Roy Oswalt, with 3.36 to Dan Haren's 3.75.
- Who won more games? Roy Oswalt, with 163 to Dan Haren's 153.
- Who recorded more strikeouts? Dan Haren, with 2,013 to Roy Oswalt's 1,852.
- Who had the better WHIP? Dan Haren, with 1.18 to Roy Oswalt's 1.21.
- Who pitched more innings? Dan Haren, with 2,419.2 to Roy Oswalt's 2,245.1.
- Who threw more shutouts? Roy Oswalt, with 8 to Dan Haren's 6.
- Who has the higher career Pitcher PIV? Roy Oswalt, with 55,095 career Pitcher PIV to Dan Haren's 24,951.
Dan Haren
Roy Oswalt
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 | Roy Oswalt |
|---|---|---|
| Wins | 153 | Leads: 163 |
| Losses not scored | 131 | 102 |
| Games | Leads: 391 | 365 |
| Games Started | Leads: 380 | 341 |
| Complete Games | 16 | Leads: 20 |
| Shutouts | 6 | Leads: 8 |
| Saves | Leads: 1 | 0 |
| Strikeouts | Leads: 2,013 | 1,852 |
| Walks not scored | 500 | 520 |
| Hits Allowed not scored | 2,357 | 2,199 |
| Home Runs Allowed not scored | 305 | 197 |
| Innings Pitched | Leads: 2,419.2 | 2,245.1 |
| ERA | 3.75 | Leads: 3.36 |
| WHIP | Leads: 1.18 | 1.21 |
| K/9 | Leads: 7.49 | 7.42 |
| BB/9 | Leads: 1.86 | 2.08 |
PIV Comparison through 2025
By PIV (Player Impact Value), Roy Oswalt outpaces Dan Haren 55,095 to 24,951 — driven by per-season impact — 3,935 PIV per season to 1,663 — rather than by longevity, since Roy Oswalt played 14 seasons to Dan Haren's 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)
Roy Oswalt — top 3 seasons by ERA (lower is better)
Verdict
On the head-to-head card, Dan Haren leads in strikeouts, WHIP, K/9, and innings pitched, while Roy Oswalt owns wins and ERA. That doesn't settle the era debate, but on the raw scoreboard the edge goes to Dan Haren. Note that PIV actually grades Roy Oswalt ahead, which means Dan Haren's edge is partly volume. Click through to each profile for the full season-by-season breakdown.
Related Matchups
How the Dan Haren and Roy Oswalt careers compare
Dan Haren and Roy Oswalt were active at the same time between 2003 and 2013. The two careers are close in length, 391 games for Dan Haren and 365 for Roy Oswalt across 15 and 14 PIV seasons, so the totals compare on fairly even terms. Where Roy Oswalt comes out ahead, it is in wins (163 to 153), complete games (20 to 16), and shutouts (8 to 6). By rate, Dan Haren struck out 7.49 and walked 1.86 per nine innings; Roy Oswalt struck out 7.42 and walked 2.08. Dan Haren was mainly a starter (380 starts in 391 games), and Roy Oswalt was mainly a starter (341 starts in 365 games).
Dan Haren vs Roy Oswalt: Frequently Asked Questions
- Who was better, Dan Haren or Roy Oswalt?
- By the career statistics compared on this page, Dan Haren leads Roy Oswalt in 8 of the 12 scored categories.
- Who had the better ERA?
- Roy Oswalt, with 3.36 to Dan Haren's 3.75.
- Who won more games?
- Roy Oswalt, with 163 to Dan Haren's 153.
- Who recorded more strikeouts?
- Dan Haren, with 2,013 to Roy Oswalt's 1,852.
- Who had the better WHIP?
- Dan Haren, with 1.18 to Roy Oswalt's 1.21.