Roy Mahaffey vs. Zac Rosscup — Career Comparison

Roy Mahaffey built a career as a starting pitcher and Zac Rosscup as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Roy Mahaffey posted stronger surface numbers — ERA 5.01 and WHIP 1.546 compared to 5.09 and 1.673 for Zac Rosscup. By the career numbers, Roy Mahaffey had the better of this cross-role comparison — though era context would sharpen the verdict.