Jimmy Key vs. Jonathan Papelbon — Career Comparison

Jimmy Key built a career as a starting pitcher and Jonathan Papelbon as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Jonathan Papelbon led in strikeout rate (K%+ 115 vs 90), skill-based run prevention (DICE+ 117 vs 102), and home run suppression (HR9+ 103 vs 93). Jimmy Key held the edge in walk avoidance (BB%+ 151 vs 147). Role difference aside, Jonathan Papelbon holds a clear edge on every meaningful shared measure.