Robbie Erlin vs. A. J. Puk — Career Comparison

Robbie Erlin built a career as a starting pitcher and A. J. Puk as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. A. J. Puk posted stronger surface numbers — ERA 3.53 and WHIP 1.225 compared to 4.87 and 1.297 for Robbie Erlin. By the career numbers, A. J. Puk had the better of this cross-role comparison — though era context would sharpen the verdict.