Jim Acker vs. Mason Black — Career Comparison

Mason Black built a career as a starting pitcher and Jim Acker as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Jim Acker posted stronger surface numbers — ERA 3.97 and WHIP 1.423 compared to 6.47 and 1.636 for Mason Black. By the career numbers, Jim Acker had the better of this cross-role comparison — though era context would sharpen the verdict.