Rafael Perez vs. Andy Sonnanstine — Career Comparison

Andy Sonnanstine built a career as a starting pitcher and Rafael Perez as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Rafael Perez led in home run suppression (HR9+ 175 vs 96), run prevention (ERA+ 135 vs 90), and skill-based run prevention (DICE+ 120 vs 109). Andy Sonnanstine held the edge in walk avoidance (BB%+ 172 vs 120). Keeping the role difference in mind, the edge still goes to Rafael Perez.