How Roy Halladay's Win Percentage Compares to Similar Players
Roy Halladay posted a career Win Percentage of 65.91, well above the starting pitcher average of 50.35 — a mark that ranked among the best of his era. His best Win Percentage season came in 1998, posting 100.0, well above the starting pitcher average of 50.79 that year. The lowest point came in 2000 at 36.36, well below the starting pitcher average of 50.51 that year. Production slipped through the final seasons. The figure moved from 76.0 in 2011 to 57.89 in 2012 and 44.44 in 2013. The decline marked the closing chapter of the career. Some season-to-season variance runs through the career line, but the career average remained well above league norms across 16 seasons.
Roy Halladay Lifetime Win Percentage
Stats similar to Win Percentage for Roy Halladay
| Roy Halladay
Win Percentage |
|---|
| Career | 65.91 |
| Season Avg. | 65.91 |
| 162 Game Avg. | 65.91 |
| More Info | See More |
Roy Halladay Win Percentage Per Season
Roy Halladay's Win Percentage for each season of his MLB career, plotted against that year's league average. Switch between comparisons — American League, Hall of Fame, SP, North America, or players born in the same country — to see how he stacked up year by year.
Roy Halladay Win Percentage by Team
Roy Halladay's career Win Percentage totals broken down by each team he played for, ordered by when he first joined that team.
Roy Halladay Win Percentage Year-Over-Year Change
A waterfall chart tracking how Roy Halladay's career Win Percentage shifted from season to season. Each bar represents the change added to his career total that year, making peak and decline phases easy to spot.
Roy Halladay Win Percentage Distribution vs. Comparable Players
Each box summarizes Roy Halladay's seasonal Win Percentage alongside a selected comparison group across all seasons he played. The box covers the middle 50% of seasons, the center line is the median, and the whiskers extend to the min and max. A tighter box means more consistency; a higher median means more output. Use the selector to switch comparison groups.
Roy Halladay Win Percentage — Season-by-Season Breakdown
Every season of Roy Halladay's MLB career with Win Percentage alongside league, Hall of Fame, positional, birth region, and country-of-birth averages for that year. Career totals include sum, average, min, max, and median.
Note: A dash (—) means no qualifying players existed in that comparison group for that season. Most commonly this happens for the Hall of Fame group.
