Joe Boyle vs. Jumbo Diaz — Career Comparison

Joe Boyle built a career as a starting pitcher and Jumbo Diaz as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Jumbo Diaz posted stronger surface numbers — ERA 4.02 and WHIP 1.375 compared to 4.98 and 1.444 for Joe Boyle. By the career numbers, Jumbo Diaz had the better of this cross-role comparison — though era context would sharpen the verdict.