Ben Callahan vs. Mike Willis — Career Comparison

Ben Callahan built a career as a starting pitcher and Mike Willis as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Mike Willis posted stronger surface numbers — ERA 4.59 and WHIP 1.524 compared to 12.54 and 2.571 for Ben Callahan. By the career numbers, Mike Willis had the better of this cross-role comparison — though era context would sharpen the verdict.