Manny Aybar vs. Don Kirkwood — Career Comparison

Don Kirkwood built a career as a starting pitcher and Manny Aybar as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Don Kirkwood posted stronger surface numbers — ERA 4.37 and WHIP 1.497 compared to 5.11 and 1.522 for Manny Aybar. By the career numbers, Don Kirkwood had the better of this cross-role comparison — though era context would sharpen the verdict.