Mark Petkovsek vs. Christian Roa — Career Comparison

On the career pitching numbers, Christian Roa posted a stronger line than Mark Petkovsek. Christian Roa posted stronger numbers in ERA (0 vs 4.74) and WHIP (1.333 vs 1.472). By the career numbers, Christian Roa 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.