Zach Jackson vs. Shannon Withem — Career Comparison

Zach Jackson built a career as a starting pitcher and Shannon Withem as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Shannon Withem posted stronger surface numbers — ERA 3 and WHIP 1.667 compared to 5.81 and 1.566 for Zach Jackson. By the career numbers, Shannon Withem had the better of this cross-role comparison — though era context would sharpen the verdict.