Frank Mack vs. Robin Roberts — Career Comparison

Robin Roberts built a career as a starting pitcher and Frank Mack as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Robin Roberts posted stronger surface numbers — ERA 3.41 and WHIP 1.184 compared to 4.94 and 1.732 for Frank Mack. By the career numbers, Robin Roberts had the better of this cross-role comparison — though era context would sharpen the verdict.