Jonathan Aro vs. Bill McCahan — Career Comparison

Bill McCahan built a career as a starting pitcher and Jonathan Aro as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Bill McCahan posted stronger surface numbers — ERA 3.84 and WHIP 1.521 compared to 6.55 and 1.909 for Jonathan Aro. By the career numbers, Bill McCahan had the better of this cross-role comparison — though era context would sharpen the verdict.