David Aardsma vs. Junior Guerra — Career Comparison

Junior Guerra 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. Junior Guerra led in walk avoidance (BB%+ 91 vs 76), run prevention (ERA+ 124 vs 109), and home run suppression (HR9+ 123 vs 114). David Aardsma held the edge in strikeout rate (K%+ 120 vs 101). Role difference aside, Junior Guerra holds a clear edge on every meaningful shared measure.