Mike Armstrong vs. Robin Roberts — Career Comparison

Robin Roberts built a career as a starting pitcher and Mike Armstrong as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Mike Armstrong led in strikeout rate (K%+ 107 vs 84), run prevention (ERA+ 110 vs 88), and home run suppression (HR9+ 95 vs 76). Robin Roberts held the edge in walk avoidance (BB%+ 166 vs 90). Role difference aside, Mike Armstrong holds a clear edge on every meaningful shared measure.