Rich Robertson vs. Mike Willis — Career Comparison

Rich Robertson built a career as a starting pitcher and Mike Willis as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Rich Robertson led in home run suppression (HR9+ 107 vs 61), run prevention (ERA+ 90 vs 81), and skill-based run prevention (DICE+ 87 vs 84). Mike Willis held the edge in walk avoidance (BB%+ 100 vs 73). Keeping the role difference in mind, the edge still goes to Rich Robertson.