Mike Duvall vs. Bob Patterson — Career Comparison

On the career pitching numbers, Bob Patterson posted a stronger line than Mike Duvall. Bob Patterson posted stronger numbers in ERA (4.08 vs 4.76) and WHIP (1.356 vs 1.863). By the career numbers, Bob Patterson 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.