Manny Aybar vs. Merrill Kelly — Career Comparison

Merrill Kelly built a career as a starting pitcher and Manny Aybar as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Merrill Kelly led in run prevention (ERA+ 114 vs 91), strikeout rate (K%+ 100 vs 80), and skill-based run prevention (DICE+ 107 vs 95). Manny Aybar held the edge in walk avoidance (BB%+ 109 vs 109). Role difference aside, Merrill Kelly holds a clear edge on every meaningful shared measure.