Ryan Helsley vs. Mark Prior — Career Comparison

Mark Prior built a career as a starting pitcher and Ryan Helsley as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Mark Prior led in strikeout rate (K%+ 170 vs 116), walk avoidance (BB%+ 110 vs 102), and skill-based run prevention (DICE+ 137 vs 130). Ryan Helsley held the edge in run prevention (ERA+ 171 vs 133). Keeping the role difference in mind, the edge still goes to Mark Prior.