Rich Robertson vs. Mauro Zarate — Career Comparison

Rich Robertson built a career as a starting pitcher and Mauro Zarate as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Rich Robertson posted stronger surface numbers — ERA 4.94 and WHIP 1.631 compared to 10.8 and 2.400 for Mauro Zarate. By the career numbers, Rich Robertson had the better of this cross-role comparison — though era context would sharpen the verdict.