John Butcher vs. Max Castillo — Career Comparison

On the career pitching numbers, John Butcher posted a stronger line than Max Castillo. John Butcher posted stronger numbers in ERA (4.42 vs 5.43) and home runs allowed (0.85 per nine innings vs 1.51). By the career numbers, John Butcher 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.