Adam Butler vs. Bob Macdonald — Career Comparison

On the career pitching numbers, Bob Macdonald posted a stronger line than Adam Butler. Bob Macdonald posted stronger numbers in ERA (4.34 vs 10.8) and WHIP (1.506 vs 2.400). By the career numbers, Bob Macdonald 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.