Josh Butler vs. Ken Robinson — Career Comparison

Looking at the career totals, Josh Butler and Ken Robinson are fairly close on the surface numbers. Ken Robinson posted stronger numbers in ERA (3.91 vs 9) and WHIP (1.303 vs 3.250). Josh Butler had the advantage in home runs allowed (0 per nine innings vs 1.49). By the career numbers, Ken Robinson 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.