Sean O'Sullivan vs. Andrew Walters — Career Comparison

Sean O'Sullivan built a career as a starting pitcher and Andrew Walters as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Andrew Walters posted stronger surface numbers — ERA 1.8 and WHIP 0.800 compared to 6.01 and 1.616 for Sean O'Sullivan. By the career numbers, Andrew Walters had the better of this cross-role comparison — though era context would sharpen the verdict.