Jack Kull vs. Nate Robertson — Career Comparison

Nate Robertson built a career as a starting pitcher and Jack Kull as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Jack Kull posted stronger surface numbers — ERA 3 and WHIP 2.667 compared to 5.01 and 1.493 for Nate Robertson. By the career numbers, Jack Kull had the better of this cross-role comparison — though era context would sharpen the verdict.