Jack Armstrong vs. Yusmeiro Petit — Career Comparison

Jack Armstrong built a career as a starting pitcher and Yusmeiro Petit as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Jack Armstrong led in home run suppression (HR9+ 85 vs 59), strikeout rate (K%+ 103 vs 82), and skill-based run prevention (DICE+ 89 vs 82). Yusmeiro Petit held the edge in walk avoidance (BB%+ 165 vs 91). Keeping the role difference in mind, the edge still goes to Jack Armstrong.