Art Mahaffey vs. John Valentine — Career Comparison

Art Mahaffey built a career as a starting pitcher and John Valentine as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. John Valentine posted stronger surface numbers — ERA 3.53 and WHIP 1.441 compared to 4.17 and 1.351 for Art Mahaffey. By the career numbers, John Valentine had the better of this cross-role comparison — though era context would sharpen the verdict.