John Koronka vs. Brian O'Connor — Career Comparison

John Koronka built a career as a starting pitcher and Brian O'Connor as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Brian O'Connor posted stronger surface numbers — ERA 5.11 and WHIP 1.865 compared to 6.25 and 1.642 for John Koronka. By the career numbers, Brian O'Connor had the better of this cross-role comparison — though era context would sharpen the verdict.