Kenley Jansen vs. Ken Johnson — Career Comparison

Ken Johnson built a career as a starting pitcher and Kenley Jansen as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Kenley Jansen led in strikeout rate (K%+ 118 vs 83), run prevention (ERA+ 128 vs 100), and skill-based run prevention (DICE+ 114 vs 95). Ken Johnson held the edge in walk avoidance (BB%+ 139 vs 119). Role difference aside, Kenley Jansen holds a clear edge on every meaningful shared measure.