Brett Anderson vs. Michael Petersen — Career Comparison

Brett Anderson built a career as a starting pitcher and Michael Petersen as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Brett Anderson posted stronger surface numbers — ERA 4.07 and WHIP 1.345 compared to 5.02 and 1.593 for Michael Petersen. By the career numbers, Brett Anderson had the better of this cross-role comparison — though era context would sharpen the verdict.