Lisalverto Bonilla vs. Dan O'Brien — Career Comparison

Lisalverto Bonilla built a career as a starting pitcher and Dan O'Brien as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Dan O'Brien posted stronger surface numbers — ERA 5.9 and WHIP 1.931 compared to 6.28 and 1.570 for Lisalverto Bonilla. By the career numbers, Dan O'Brien had the better of this cross-role comparison — though era context would sharpen the verdict.