Robbie Erlin vs. Sid Peterson — Career Comparison

Robbie Erlin built a career as a starting pitcher and Sid Peterson as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Sid Peterson posted stronger surface numbers — ERA 2.7 and WHIP 1.800 compared to 4.87 and 1.297 for Robbie Erlin. By the career numbers, Sid Peterson had the better of this cross-role comparison — though era context would sharpen the verdict.