John Perkovich vs. Kyle Peterson — Career Comparison

Kyle Peterson built a career as a starting pitcher and John Perkovich as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Kyle Peterson posted stronger surface numbers — ERA 4.71 and WHIP 1.516 compared to 7.2 and 1.600 for John Perkovich. By the career numbers, Kyle Peterson had the better of this cross-role comparison — though era context would sharpen the verdict.