Roy Halladay vs Yoshinobu Yamamoto: Career Stats Comparison
Roy Halladay has the better career line of the two, leading 9 of the 12 scored categories on this page (4 further counting totals are shown but not scored). Roy Halladay played 1998–2013 as a pitcher; Yoshinobu Yamamoto has played 2024–present 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
Roy Halladay (1998–2013) and Yoshinobu Yamamoto (2024–present) — breaking in during the 1990s and the 2020s respectively, so they pitched against very different hitting environments. Roy Halladay finished with 203 wins and 2,117 strikeouts; Yoshinobu Yamamoto has 33 wins and 488 strikeouts through October 12, 2026. The numbers below run them through identical career and rate-stat lenses.
Quick answer
- Who had the better ERA? Yoshinobu Yamamoto, with 2.61 to Roy Halladay's 3.38.
- Who won more games? Roy Halladay, with 203 to Yoshinobu Yamamoto's 33.
- Who recorded more strikeouts? Roy Halladay, with 2,117 to Yoshinobu Yamamoto's 488.
- Who had the better WHIP? Yoshinobu Yamamoto, with 0.97 to Roy Halladay's 1.18.
- Who pitched more innings? Roy Halladay, with 2,749.1 to Yoshinobu Yamamoto's 448.2.
- Who threw more shutouts? Roy Halladay, with 20 to Yoshinobu Yamamoto's 0.
- Who has the higher career Pitcher PIV? Roy Halladay, with 66,478 career Pitcher PIV to Yoshinobu Yamamoto's 8,844.
Roy Halladay
Yoshinobu Yamamoto
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 2020s were different run environments, so read them against their eras, or use the PIV card below, which is adjusted.
Yoshinobu Yamamoto is still active — his totals below are current through October 12, 2026.
| Statistic | Roy Halladay | Yoshinobu Yamamoto |
|---|---|---|
| Wins | Leads: 203 | 33 |
| Losses not scored | 105 | 19 |
| Games | Leads: 416 | 76 |
| Games Started | Leads: 390 | 76 |
| Complete Games | Leads: 67 | 1 |
| Shutouts | Leads: 20 | 0 |
| Saves | Leads: 1 | 0 |
| Strikeouts | Leads: 2,117 | 488 |
| Walks not scored | 592 | 123 |
| Hits Allowed not scored | 2,646 | 310 |
| Home Runs Allowed not scored | 236 | 41 |
| Innings Pitched | Leads: 2,749.1 | 448.2 |
| ERA | 3.38 | Leads: 2.61 |
| WHIP | 1.18 | Leads: 0.97 |
| K/9 | 6.93 | Leads: 9.79 |
| BB/9 | Leads: 1.94 | 2.47 |
PIV Comparison through 2025
By PIV (Player Impact Value), Roy Halladay outpaces Yoshinobu Yamamoto 66,478 to 8,844 — a longevity gap rather than a per-season one: Roy Halladay played 16 seasons to Yoshinobu Yamamoto's 2, while Yoshinobu Yamamoto carries the higher per-season figure (4,422 to 4,155). 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).
Roy Halladay — top 3 seasons by ERA (lower is better)
Yoshinobu Yamamoto — top 2 seasons by ERA (lower is better)
Verdict
On the head-to-head card, Roy Halladay leads in wins, strikeouts, and innings pitched, while Yoshinobu Yamamoto owns ERA, WHIP, and K/9. That doesn't settle the era debate, but on the raw scoreboard the edge goes to Roy Halladay. PIV agrees: Roy Halladay grades out higher across their careers. Click through to each profile for the full season-by-season breakdown.
Related Matchups
How the Roy Halladay and Yoshinobu Yamamoto careers compare
No season is shared: Roy Halladay played 1998–2013, Yoshinobu Yamamoto 2024–present. Roy Halladay has the far longer record, 416 games against 76 across 16 and 2 PIV seasons, which inflates every career total. Yoshinobu Yamamoto's edges on the table are ERA (2.61 to 3.38), WHIP (0.97 to 1.18), and strikeouts per nine (9.79 to 6.93). By rate, Roy Halladay struck out 6.93 and walked 1.94 per nine innings; Yoshinobu Yamamoto struck out 9.79 and walked 2.47. Roy Halladay was mainly a starter (390 starts in 416 games), and Yoshinobu Yamamoto was mainly a starter (76 starts in 76 games). Complete games (67 to 1) show how differently the two eras used starters. Yoshinobu Yamamoto's numbers are live and update with each game, so the comparison is a snapshot.
Roy Halladay vs Yoshinobu Yamamoto: Frequently Asked Questions
- Who was better, Roy Halladay or Yoshinobu Yamamoto?
- By the career statistics compared on this page, Roy Halladay leads Yoshinobu Yamamoto in 9 of the 12 scored categories.
- Who had the better ERA?
- Yoshinobu Yamamoto, with 2.61 to Roy Halladay's 3.38.
- Who won more games?
- Roy Halladay, with 203 to Yoshinobu Yamamoto's 33.
- Who recorded more strikeouts?
- Roy Halladay, with 2,117 to Yoshinobu Yamamoto's 488.
- Who had the better WHIP?
- Yoshinobu Yamamoto, with 0.97 to Roy Halladay's 1.18.