Mike Jerzembeck vs. Isidro Marquez — Career Comparison

Mike Jerzembeck built a career as a starting pitcher and Isidro Marquez as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Isidro Marquez posted stronger surface numbers — ERA 6.75 and WHIP 1.650 compared to 12.79 and 2.053 for Mike Jerzembeck. By the career numbers, Isidro Marquez had the better of this cross-role comparison — though era context would sharpen the verdict.