Rudy Hernandez vs. John Koronka — Career Comparison

John Koronka built a career as a starting pitcher and Rudy Hernandez as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Rudy Hernandez posted stronger surface numbers — ERA 4.12 and WHIP 1.580 compared to 6.25 and 1.642 for John Koronka. By the career numbers, Rudy Hernandez had the better of this cross-role comparison — though era context would sharpen the verdict.