David Aardsma vs. James McDonald — Career Comparison

James McDonald 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 home run suppression (HR9+ 114 vs 82), run prevention (ERA+ 109 vs 94), and strikeout rate (K%+ 120 vs 107). Role difference aside, David Aardsma holds a clear edge on every meaningful shared measure.