How Art Mahaffey's Home Runs Allowed Per 9 Innings Compares to Similar Players

Art Mahaffey posted a career Home Runs Allowed Per 9 Innings of 1.13, well above the starting pitcher average of .730 — production that significantly underperformed against league baselines. His strongest Home Runs Allowed Per 9 Innings season came in 1960, posting .870, near the starting pitcher average of .867 that year. The highest point came in 1966 at 1.8, well above the starting pitcher average of .874 that year, a partial season. Production slipped through the final seasons. The figure moved from .970 in 1964 to 1.39 in 1965 and 1.8 in 1966. 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 below league norms across 7 seasons.

Art Mahaffey Lifetime Home Runs Allowed Per 9 Innings

Stats similar to Home Runs Allowed Per 9 Innings for Art Mahaffey
Art Mahaffey
Home Runs Allowed Per 9 Innings
Career1.13
Season Avg.1.13
162 Game Avg.1.13
More InfoSee More

Art Mahaffey Home Runs Allowed Per 9 Innings Per Season

Art Mahaffey's Home Runs Allowed Per 9 Innings for each season of his MLB career, plotted against that year's league average. Switch between comparisons — National League, Hall of Fame, SP, North America, or players born in the same country — to see how he stacked up year by year.
Art Mahaffey Home Runs Allowed Per 9 Innings per season line chart

Art Mahaffey Home Runs Allowed Per 9 Innings by Team

Art Mahaffey's career Home Runs Allowed Per 9 Innings totals broken down by each team he played for, ordered by when he first joined that team.
Art Mahaffey career Home Runs Allowed Per 9 Innings by team bar chart

Art Mahaffey Home Runs Allowed Per 9 Innings Year-Over-Year Change

A waterfall chart tracking how Art Mahaffey's career Home Runs Allowed Per 9 Innings 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.
Art Mahaffey Home Runs Allowed Per 9 Innings year-over-year waterfall chart

Art Mahaffey Home Runs Allowed Per 9 Innings Distribution vs. Comparable Players

Each box summarizes Art Mahaffey's seasonal Home Runs Allowed Per 9 Innings 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.
Art Mahaffey Home Runs Allowed Per 9 Innings distribution box chart versus comparable players

Art Mahaffey Home Runs Allowed Per 9 Innings — Season-by-Season Breakdown

Every season of Art Mahaffey's MLB career with Home Runs Allowed Per 9 Innings 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.
Art Mahaffey Home Runs Allowed Per 9 Innings season-by-season breakdown table