Mike Foltynewicz vs. Bob Kaiser — Career Comparison

Mike Foltynewicz built a career as a starting pitcher and Bob Kaiser as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Bob Kaiser posted stronger surface numbers — ERA 4.5 and WHIP 1.833 compared to 4.52 and 1.327 for Mike Foltynewicz. By the career numbers, Bob Kaiser had the better of this cross-role comparison — though era context would sharpen the verdict.