John Costello vs. Tomo Ohka — Career Comparison

Tomo Ohka built a career as a starting pitcher and John Costello as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. John Costello led in run prevention (ERA+ 135 vs 106), strikeout rate (K%+ 99 vs 83), and home run suppression (HR9+ 115 vs 102). Tomo Ohka held the edge in walk avoidance (BB%+ 140 vs 91). Keeping the role difference in mind, the edge still goes to John Costello.