Sean O'Sullivan vs. Kevin Walker — Career Comparison

Sean O'Sullivan built a career as a starting pitcher and Kevin Walker as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Kevin Walker posted stronger surface numbers — ERA 4.76 and WHIP 1.539 compared to 6.01 and 1.616 for Sean O'Sullivan. By the career numbers, Kevin Walker had the better of this cross-role comparison — though era context would sharpen the verdict.