Sean O'Sullivan vs. Jack Warner — Career Comparison

Sean O'Sullivan built a career as a starting pitcher and Jack Warner as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Jack Warner posted stronger surface numbers — ERA 5.1 and WHIP 1.610 compared to 6.01 and 1.616 for Sean O'Sullivan. By the career numbers, Jack Warner had the better of this cross-role comparison — though era context would sharpen the verdict.