Jack Armstrong vs. Aaron Crow — Career Comparison

Jack Armstrong built a career as a starting pitcher and Aaron Crow as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Aaron Crow led in run prevention (ERA+ 114 vs 89), home run suppression (HR9+ 100 vs 85), and skill-based run prevention (DICE+ 97 vs 89). Jack Armstrong held the edge in walk avoidance (BB%+ 91 vs 88). Keeping the role difference in mind, the edge still goes to Aaron Crow.