Mark Leiter vs. Robert Stephenson — Career Comparison

Mark Leiter built a career as a starting pitcher and Robert Stephenson as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Robert Stephenson led in home run suppression (HR9+ 88 vs 80), run prevention (ERA+ 97 vs 92), and skill-based run prevention (DICE+ 97 vs 93). Mark Leiter held the edge in strikeout rate (K%+ 107 vs 101). Role difference aside, Robert Stephenson holds a clear edge on every meaningful shared measure.