David Aardsma vs. Wily Peralta — Career Comparison

Wily Peralta built a career as a starting pitcher and David Aardsma as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. David Aardsma led in strikeout rate (K%+ 120 vs 81), home run suppression (HR9+ 114 vs 88), and run prevention (ERA+ 109 vs 91). Wily Peralta held the edge in walk avoidance (BB%+ 93 vs 76). Role difference aside, David Aardsma holds a clear edge on every meaningful shared measure.