Sean O'Sullivan vs. Hal Trosky Jr. — Career Comparison

Sean O'Sullivan built a career as a starting pitcher and Hal Trosky Jr. as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Hal Trosky Jr. posted stronger surface numbers — ERA 6 and WHIP 2.333 compared to 6.01 and 1.616 for Sean O'Sullivan. By the career numbers, Hal Trosky Jr. had the better of this cross-role comparison — though era context would sharpen the verdict.