Luis Perez vs. Adam Peterson — Career Comparison

Adam Peterson built a career as a starting pitcher and Luis Perez as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Luis Perez posted stronger surface numbers — ERA 4.5 and WHIP 1.446 compared to 5.46 and 1.516 for Adam Peterson. By the career numbers, Luis Perez had the better of this cross-role comparison — though era context would sharpen the verdict.