Mike Armstrong vs. Oliver Perez — Career Comparison

Oliver Perez 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 walk avoidance (BB%+ 90 vs 65), run prevention (ERA+ 110 vs 91), and home run suppression (HR9+ 95 vs 77). Oliver Perez held the edge in strikeout rate (K%+ 131 vs 107). Role difference aside, Mike Armstrong holds a clear edge on every meaningful shared measure.