Adam Peterson vs. Thyago Vieira — Career Comparison

Adam Peterson built a career as a starting pitcher and Thyago Vieira as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Adam Peterson posted stronger surface numbers — ERA 5.46 and WHIP 1.516 compared to 5.81 and 1.665 for Thyago Vieira. By the career numbers, Adam Peterson had the better of this cross-role comparison — though era context would sharpen the verdict.