Mauricio Robles vs. Shad Williams — Career Comparison

On the career pitching numbers, Mauricio Robles posted a stronger line than Shad Williams. Mauricio Robles posted stronger numbers in ERA (1.93 vs 8.59) and WHIP (2.143 vs 2.352). By the career numbers, Mauricio Robles 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.