Mark Petkovsek vs. Shad Williams — Career Comparison

On the career pitching numbers, Mark Petkovsek posted a stronger line than Shad Williams. Mark Petkovsek posted stronger numbers in ERA (4.74 vs 8.59) and WHIP (1.472 vs 2.352). By the career numbers, Mark Petkovsek had the better of this comparison — though ERA and WHIP alone don't account for era, park factors, or the defenses each pitcher worked behind.