Mark Prior vs. Jean-Pierre Roy — Career Comparison

On the career pitching numbers, Mark Prior posted a stronger line than Jean-Pierre Roy. Mark Prior posted stronger numbers in ERA (3.51 vs 9.95) and WHIP (1.240 vs 1.579). By the career numbers, Mark Prior 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.