Zack Greinke vs Roy Halladay: Career Stats Comparison
Zack Greinke and Roy Halladay are close to even, splitting the 8 scored categories on this page 4–4 (8 further counting totals are shown but not scored). Zack Greinke played 2004–2023 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
Zack Greinke (2004–2023) and Roy Halladay (1998–2013) — they debuted in the 2000s and the 1990s respectively and share 10 seasons. Zack Greinke finished with 225 wins and 2,979 strikeouts; Roy Halladay finished with 203 wins and 2,117 strikeouts. The table below sets out their careers line by line.
Quick answer
- Who leads the career comparison? Neither — they split the 8 scored categories 4–4.
- Who had the better ERA? Roy Halladay, with 3.38 to Zack Greinke's 3.49.
- Who won more games? Zack Greinke, with 225 to Roy Halladay's 203.
- Who recorded more strikeouts? Zack Greinke, with 2,979 to Roy Halladay's 2,117.
- Who had the better WHIP? Zack Greinke, with 1.17 to Roy Halladay's 1.18.
- How many innings did each pitch? Zack Greinke 3,389.1, Roy Halladay 2,749.1.
- Who threw more shutouts? Roy Halladay, with 20 to Zack Greinke's 5.
Zack Greinke
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. 8 of the 16 lines below are scored; the other 8 are shown but not scored. Games, starts and innings measure playing time, and losses, walks and hits allowed track how long someone pitched, so they are left unmarked, as is any line where both players are at zero. 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 | Zack Greinke | Roy Halladay |
|---|---|---|
| Wins | Leads: 225 | 203 |
| Losses not scored | 156 | 105 |
| Games not scored | 586 | 416 |
| Games Started not scored | 541 | 390 |
| Complete Games | 17 | Leads: 67 |
| Shutouts | 5 | Leads: 20 |
| Saves not scored | 1 | 1 |
| Strikeouts | Leads: 2,979 | 2,117 |
| Walks not scored | 762 | 592 |
| Hits Allowed not scored | 3,207 | 2,646 |
| Home Runs Allowed not scored | 367 | 236 |
| Innings Pitched not scored | 3,389.1 | 2,749.1 |
| ERA | 3.49 | Leads: 3.38 |
| WHIP | Leads: 1.17 | 1.18 |
| K/9 | Leads: 7.91 | 6.93 |
| BB/9 | 2.02 | Leads: 1.94 |
PIV Comparison
By PIV (Player Impact Value), Roy Halladay leads Zack Greinke 66,478 to 58,246 — driven by per-season impact — 4,155 PIV per season to 2,912 — rather than by longevity, since Roy Halladay played 16 seasons to Zack Greinke's 20. PIV adjusts each season to league baselines, so it's the cleanest way to compare careers across eras.
Peak Seasons
The best single seasons each player produced, ranked by ERA among qualified workloads (120+ innings).
Zack Greinke — top 3 seasons by ERA (lower is better)
Roy Halladay — top 3 seasons by ERA (lower is better)
Verdict
Zack Greinke and Roy Halladay split the 8 scored categories on the head-to-head card 4-4. On the raw scoreboard neither has the edge. PIV, which is era-adjusted, grades Roy Halladay higher. Click through to each profile for the full season-by-season breakdown.
Related Matchups
How the Zack Greinke and Roy Halladay careers compare
Zack Greinke and Roy Halladay were active at the same time between 2004 and 2013. With 586 games against 416 across 20 and 16 PIV seasons, neither player's totals owe much to extra seasons. The green cells for Roy Halladay are complete games (67 to 17), shutouts (20 to 5), and ERA (3.38 to 3.49). The per-nine rows read 7.91 strikeouts and 2.02 walks for Zack Greinke, 6.93 and 1.94 for Roy Halladay. Both had the same role: Zack Greinke was mainly a starter (541 starts in 586 games); Roy Halladay was mainly a starter (390 starts in 416 games). The complete-game row, 17 against 67, reflects how much longer starters once stayed in games.
Zack Greinke vs Roy Halladay: Frequently Asked Questions
- Who was better, Zack Greinke or Roy Halladay?
- By the career statistics compared on this page, neither leads: they split the 8 scored categories 4–4.
- Who had the better ERA?
- Roy Halladay, with 3.38 to Zack Greinke's 3.49.
- Who won more games?
- Zack Greinke, with 225 to Roy Halladay's 203.
- Who recorded more strikeouts?
- Zack Greinke, with 2,979 to Roy Halladay's 2,117.
- Who had the better WHIP?
- Zack Greinke, with 1.17 to Roy Halladay's 1.18.