Casey Janssen vs. Shaun Marcum — Career Comparison

Shaun Marcum built a career as a starting pitcher and Casey Janssen as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Shaun Marcum led in strikeout rate (K%+ 114 vs 76), run prevention (ERA+ 116 vs 87), and skill-based run prevention (DICE+ 101 vs 94). Casey Janssen held the edge in walk avoidance (BB%+ 171 vs 112). Role difference aside, Shaun Marcum holds a clear edge on every meaningful shared measure.