Santiago Guzman vs. Mark Petkovsek — Career Comparison

Santiago Guzman built a career as a starting pitcher and Mark Petkovsek as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Santiago Guzman posted stronger surface numbers — ERA 4.5 and WHIP 1.531 compared to 4.74 and 1.472 for Mark Petkovsek. By the career numbers, Santiago Guzman had the better of this cross-role comparison — though era context would sharpen the verdict.