Hisashi Iwakuma vs. Roy Thomas — Career Comparison

Hisashi Iwakuma built a career as a starting pitcher and Roy Thomas as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Hisashi Iwakuma led in walk avoidance (BB%+ 160 vs 90), run prevention (ERA+ 124 vs 100), and skill-based run prevention (DICE+ 109 vs 99). Roy Thomas held the edge in home run suppression (HR9+ 121 vs 96). Keeping the role difference in mind, the edge still goes to Hisashi Iwakuma.