Bill Koski vs. Izzy Leon — Career Comparison

Izzy Leon built a career as a starting pitcher and Bill Koski as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Izzy Leon posted stronger surface numbers — ERA 5.35 and WHIP 1.759 compared to 6.67 and 2.000 for Bill Koski. By the career numbers, Izzy Leon had the better of this cross-role comparison — though era context would sharpen the verdict.