Joel Peralta vs. Roy Witherup — Career Comparison

Roy Witherup built a career as a starting pitcher and Joel Peralta as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Joel Peralta posted stronger surface numbers — ERA 4.03 and WHIP 1.194 compared to 4.44 and 1.454 for Roy Witherup. By the career numbers, Joel Peralta had the better of this cross-role comparison — though era context would sharpen the verdict.