Rolando Arrojo vs. Jim Peterson — Career Comparison

Rolando Arrojo built a career as a starting pitcher and Jim Peterson as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Rolando Arrojo posted stronger surface numbers — ERA 4.55 and WHIP 1.407 compared to 5.27 and 1.665 for Jim Peterson. By the career numbers, Rolando Arrojo had the better of this cross-role comparison — though era context would sharpen the verdict.