Dominic Leone vs. Art Mahaffey — Career Comparison

Art Mahaffey built a career as a starting pitcher and Dominic Leone as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Dominic Leone led in run prevention (ERA+ 121 vs 90), home run suppression (HR9+ 103 vs 79), and skill-based run prevention (DICE+ 102 vs 90). Art Mahaffey held the edge in walk avoidance (BB%+ 94 vs 90). Role difference aside, Dominic Leone holds a clear edge on every meaningful shared measure.