Jonathan Aro vs. Spencer Schwellenbach — Career Comparison

Spencer Schwellenbach 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. Spencer Schwellenbach posted stronger surface numbers — ERA 3.23 and WHIP 1.016 compared to 6.55 and 1.909 for Jonathan Aro. By the career numbers, Spencer Schwellenbach had the better of this cross-role comparison — though era context would sharpen the verdict.