Zack Greinke vs Roy Halladay: Career Stats Comparison
Zack Greinke has the better career line of the two, leading 7 of the 11 statistical categories compared on this page. Zack Greinke has played 2004–present 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–present) and Roy Halladay (1998–2013) — breaking in during the 2000s and the 1990s respectively, so they pitched against very different hitting environments. Zack Greinke compiled 225 wins and 2,979 strikeouts; Roy Halladay put up 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? 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.
- Who pitched more innings? Zack Greinke, with 3,389 to Roy Halladay's 2,749.
- Who threw more shutouts? Roy Halladay, with 20 to Zack Greinke's 5.
- Who has the higher career Pitcher PIV? Roy Halladay, with 66,478 career Pitcher PIV to Zack Greinke's 58,246.
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. 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: compare them with the era in mind, or use the PIV card below, which is.
| Statistic | Zack Greinke | Roy Halladay |
|---|---|---|
| Wins | Leads: 225 | 203 |
| Losses | 156 | 105 |
| Games | Leads: 586 | 416 |
| Games Started | Leads: 541 | 390 |
| Complete Games | 17 | Leads: 67 |
| Shutouts | 5 | Leads: 20 |
| Saves | 1 | 1 |
| Strikeouts | Leads: 2,979 | 2,117 |
| Walks | 762 | 592 |
| Hits Allowed | 3,207 | 2,646 |
| Home Runs Allowed | 367 | 236 |
| Innings Pitched | Leads: 3,389 | 2,749 |
| 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 — a gap driven primarily by per-season impact (4,155 vs 2,648 per year). 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
On the head-to-head card, Zack Greinke leads in wins, strikeouts, WHIP, and K/9, while Roy Halladay owns ERA. That doesn't settle the era debate, but on the raw scoreboard the edge goes to Zack Greinke. Note that PIV actually grades Roy Halladay ahead, which means Zack Greinke's edge is partly volume. Click through to each profile for the full season-by-season breakdown.
Related Matchups
Zack Greinke vs Roy Halladay: Frequently Asked Questions
- Who was better, Zack Greinke or Roy Halladay?
- By the career statistics compared on this page, Zack Greinke leads Roy Halladay in 7 of 11 categories.
- 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.