Mike Foltynewicz vs. William Sullivan — Career Comparison

Mike Foltynewicz built a career as a starting pitcher and William Sullivan as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. William Sullivan posted stronger surface numbers — ERA 4.5 and WHIP 1.667 compared to 4.52 and 1.327 for Mike Foltynewicz. By the career numbers, William Sullivan had the better of this cross-role comparison — though era context would sharpen the verdict.