Bob Gibson vs Roy Halladay: Career Stats Comparison
Bob Gibson has the better career line of the two, leading 10 of the 12 scored categories on this page (4 further counting totals are shown but not scored). Bob Gibson played 1959–1975 as a pitcher; Roy Halladay played 1998–2013 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
Bob Gibson (1959–1975) and Roy Halladay (1998–2013) — breaking in during the 1950s and the 1990s respectively, so they pitched against very different hitting environments. Bob Gibson finished with 251 wins and 3,117 strikeouts; Roy Halladay finished with 203 wins and 2,117 strikeouts. The numbers below run them through identical career and rate-stat lenses.
Quick answer
- Who had the better ERA? Bob Gibson, with 2.91 to Roy Halladay's 3.38.
- Who won more games? Bob Gibson, with 251 to Roy Halladay's 203.
- Who recorded more strikeouts? Bob Gibson, with 3,117 to Roy Halladay's 2,117.
- Who had the better WHIP? Roy Halladay, with 1.18 to Bob Gibson's 1.19.
- Who pitched more innings? Bob Gibson, with 3,884.1 to Roy Halladay's 2,749.1.
- Who threw more shutouts? Bob Gibson, with 56 to Roy Halladay's 20.
- Who has the higher career Pitcher PIV? Bob Gibson, with 69,720 career Pitcher PIV to Roy Halladay's 66,478.
Bob Gibson
Roy Halladay
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 1950s and the 1990s were different run environments, so read them against their eras, or use the PIV card below, which is adjusted.
| Statistic | Bob Gibson | Roy Halladay |
|---|---|---|
| Wins | Leads: 251 | 203 |
| Losses not scored | 174 | 105 |
| Games | Leads: 528 | 416 |
| Games Started | Leads: 482 | 390 |
| Complete Games | Leads: 255 | 67 |
| Shutouts | Leads: 56 | 20 |
| Saves | Leads: 6 | 1 |
| Strikeouts | Leads: 3,117 | 2,117 |
| Walks not scored | 1,336 | 592 |
| Hits Allowed not scored | 3,279 | 2,646 |
| Home Runs Allowed not scored | 257 | 236 |
| Innings Pitched | Leads: 3,884.1 | 2,749.1 |
| ERA | Leads: 2.91 | 3.38 |
| WHIP | 1.19 | Leads: 1.18 |
| K/9 | Leads: 7.22 | 6.93 |
| BB/9 | 3.10 | Leads: 1.94 |
PIV Comparison through 2025
By PIV (Player Impact Value), Bob Gibson edges Roy Halladay 69,720 to 66,478 — a longevity gap rather than a per-season one: Bob Gibson played 17 seasons to Roy Halladay's 16, while Roy Halladay carries the higher per-season figure (4,155 to 4,101). 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).
Bob Gibson — top 3 seasons by ERA (lower is better)
Roy Halladay — top 3 seasons by ERA (lower is better)
Verdict
On the head-to-head card, Bob Gibson leads in wins, strikeouts, ERA, and K/9, while Roy Halladay owns WHIP. That doesn't settle the era debate, but on the raw scoreboard the edge goes to Bob Gibson. PIV agrees: Bob Gibson grades out higher across their careers. Click through to each profile for the full season-by-season breakdown.
Related Matchups
How the Bob Gibson and Roy Halladay careers compare
The two careers never overlapped: Bob Gibson's ended in 1975, and Roy Halladay debuted in 1998. The two careers are close in length, 528 games for Bob Gibson and 416 for Roy Halladay across 17 and 16 PIV seasons, so the totals compare on fairly even terms. Roy Halladay's edges on the table are WHIP (1.18 to 1.19) and walks per nine (1.94 to 3.10). The per-nine rows read 7.22 strikeouts and 3.10 walks for Bob Gibson, 6.93 and 1.94 for Roy Halladay. Both had the same role: Bob Gibson was mainly a starter (482 starts in 528 games); Roy Halladay was mainly a starter (390 starts in 416 games).
Bob Gibson vs Roy Halladay: Frequently Asked Questions
- Who was better, Bob Gibson or Roy Halladay?
- By the career statistics compared on this page, Bob Gibson leads Roy Halladay in 10 of the 12 scored categories.
- Who had the better ERA?
- Bob Gibson, with 2.91 to Roy Halladay's 3.38.
- Who won more games?
- Bob Gibson, with 251 to Roy Halladay's 203.
- Who recorded more strikeouts?
- Bob Gibson, with 3,117 to Roy Halladay's 2,117.
- Who had the better WHIP?
- Roy Halladay, with 1.18 to Bob Gibson's 1.19.