Unknown Arthur vs. Mort Cooper — Career Comparison

Mort Cooper built a career as a starting pitcher and Unknown Arthur as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Unknown Arthur posted stronger surface numbers — ERA 0 and WHIP 1.000 compared to 2.97 and 1.215 for Mort Cooper. By the career numbers, Unknown Arthur had the better of this cross-role comparison — though era context would sharpen the verdict.