Dan Jennings vs. Josef Koukalik — Career Comparison

Josef Koukalik built a career as a starting pitcher and Dan Jennings as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Josef Koukalik posted stronger surface numbers — ERA 1.13 and WHIP 1.750 compared to 3.1 and 1.486 for Dan Jennings. By the career numbers, Josef Koukalik had the better of this cross-role comparison — though era context would sharpen the verdict.