Frank Arellanes vs. Mark Prior — Career Comparison

On the career pitching numbers, Frank Arellanes posted a stronger line than Mark Prior. Frank Arellanes posted stronger numbers in ERA (2.28 vs 3.51) and WHIP (1.081 vs 1.240). By the career numbers, Frank Arellanes 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.