Jose Diaz vs. Rolla Mapel — Career Comparison

Rolla Mapel built a career as a starting pitcher and Jose Diaz as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Rolla Mapel posted stronger surface numbers — ERA 4.5 and WHIP 1.700 compared to 9.39 and 2.609 for Jose Diaz. By the career numbers, Rolla Mapel had the better of this cross-role comparison — though era context would sharpen the verdict.