Casey Janssen vs. Mickey Mahler — Career Comparison

Mickey Mahler 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. Casey Janssen led in walk avoidance (BB%+ 171 vs 78), run prevention (ERA+ 87 vs 70), and home run suppression (HR9+ 85 vs 69). Mickey Mahler held the edge in strikeout rate (K%+ 115 vs 76). Role difference aside, Casey Janssen holds a clear edge on every meaningful shared measure.