Mike Duvall vs. Ernie Koob — Career Comparison

Ernie Koob built a career as a starting pitcher and Mike Duvall as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Ernie Koob posted stronger surface numbers — ERA 3.13 and WHIP 1.348 compared to 4.76 and 1.863 for Mike Duvall. By the career numbers, Ernie Koob had the better of this cross-role comparison — though era context would sharpen the verdict.