Frank Mack vs. Ben Rivera — Career Comparison

Ben Rivera 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. Ben Rivera posted stronger surface numbers — ERA 4.52 and WHIP 1.489 compared to 4.94 and 1.732 for Frank Mack. By the career numbers, Ben Rivera had the better of this cross-role comparison — though era context would sharpen the verdict.