Jonathan Papelbon vs. Adam Peterson — Career Comparison

Adam Peterson built a career as a starting pitcher and Jonathan Papelbon as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Jonathan Papelbon posted stronger surface numbers — ERA 2.44 and WHIP 1.068 compared to 5.46 and 1.516 for Adam Peterson. By the career numbers, Jonathan Papelbon had the better of this cross-role comparison — though era context would sharpen the verdict.