Mack Allison vs. Jack O'Connor — Career Comparison

Mack Allison built a career as a starting pitcher and Jack O'Connor as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Mack Allison posted stronger surface numbers — ERA 3.17 and WHIP 1.273 compared to 4.89 and 1.657 for Jack O'Connor. By the career numbers, Mack Allison had the better of this cross-role comparison — though era context would sharpen the verdict.