Jon Lester vs Roy Oswalt: Career Stats Comparison
Jon Lester has the better career line of the two, leading 6 of the 12 scored categories on this page (4 further counting totals are shown but not scored). Jon Lester played 2006–2021 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
Jon Lester (2006–2021) and Roy Oswalt (2001–2013) — both came up during the 2000s, so the matchup is a direct one. Jon Lester finished with 200 wins and 2,488 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 Jon Lester's 3.66.
- Who won more games? Jon Lester, with 200 to Roy Oswalt's 163.
- Who recorded more strikeouts? Jon Lester, with 2,488 to Roy Oswalt's 1,852.
- Who had the better WHIP? Roy Oswalt, with 1.21 to Jon Lester's 1.28.
- Who pitched more innings? Jon Lester, with 2,740.0 to Roy Oswalt's 2,245.1.
- Who threw more shutouts? Roy Oswalt, with 8 to Jon Lester's 4.
- Who has the higher career Pitcher PIV? Roy Oswalt, with 55,095 career Pitcher PIV to Jon Lester's 26,549.
Jon Lester
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 | Jon Lester | Roy Oswalt |
|---|---|---|
| Wins | Leads: 200 | 163 |
| Losses not scored | 117 | 102 |
| Games | Leads: 452 | 365 |
| Games Started | Leads: 451 | 341 |
| Complete Games | 15 | Leads: 20 |
| Shutouts | 4 | Leads: 8 |
| Saves | 0 | 0 |
| Strikeouts | Leads: 2,488 | 1,852 |
| Walks not scored | 892 | 520 |
| Hits Allowed not scored | 2,610 | 2,199 |
| Home Runs Allowed not scored | 294 | 197 |
| Innings Pitched | Leads: 2,740.0 | 2,245.1 |
| ERA | 3.66 | Leads: 3.36 |
| WHIP | 1.28 | Leads: 1.21 |
| K/9 | Leads: 8.17 | 7.42 |
| BB/9 | 2.93 | Leads: 2.08 |
PIV Comparison through 2025
By PIV (Player Impact Value), Roy Oswalt outpaces Jon Lester 55,095 to 26,549 — driven by per-season impact — 3,935 PIV per season to 1,475 — rather than by longevity, since Roy Oswalt played 14 seasons to Jon Lester's 18. 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).
Jon Lester — 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, Jon Lester leads in wins, strikeouts, K/9, and innings pitched, while Roy Oswalt owns ERA and WHIP. That doesn't settle the era debate, but on the raw scoreboard the edge goes to Jon Lester. Note that PIV actually grades Roy Oswalt ahead, which means Jon Lester's edge is partly volume. Click through to each profile for the full season-by-season breakdown.
Related Matchups
How the Jon Lester and Roy Oswalt careers compare
The careers of Jon Lester (2006–2021) and Roy Oswalt (2001–2013) overlapped from 2006 to 2013, so for those seasons they faced the same league conditions. The two careers are close in length, 452 games for Jon Lester and 365 for Roy Oswalt across 18 and 14 PIV seasons, so the totals compare on fairly even terms. The per-nine rows read 8.17 strikeouts and 2.93 walks for Jon Lester, 7.42 and 2.08 for Roy Oswalt. Jon Lester was mainly a starter (451 starts in 452 games), and Roy Oswalt was mainly a starter (341 starts in 365 games). In WHIP, Roy Oswalt's 1.21 beats Jon Lester's 1.28.
Jon Lester vs Roy Oswalt: Frequently Asked Questions
- Who was better, Jon Lester or Roy Oswalt?
- By the career statistics compared on this page, Jon Lester leads Roy Oswalt in 6 of the 12 scored categories.
- Who had the better ERA?
- Roy Oswalt, with 3.36 to Jon Lester's 3.66.
- Who won more games?
- Jon Lester, with 200 to Roy Oswalt's 163.
- Who recorded more strikeouts?
- Jon Lester, with 2,488 to Roy Oswalt's 1,852.
- Who had the better WHIP?
- Roy Oswalt, with 1.21 to Jon Lester's 1.28.