Charlie Butler vs. John Mackinson — Career Comparison

Looking at the career totals, Charlie Butler and John Mackinson are fairly close on the surface numbers. John Mackinson posted stronger numbers in ERA (7.36 vs 9) and WHIP (1.773 vs 3.000). Charlie Butler had the advantage in home runs allowed (0 per nine innings vs 1.23). By the career numbers, John Mackinson 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.