Mac MacArthur vs. Justin Topa — Career Comparison

Looking at the career totals, Mac MacArthur and Justin Topa are fairly close on the surface numbers. Justin Topa posted stronger numbers in ERA (3.79 vs 5.02) and WHIP (1.390 vs 1.500). Mac MacArthur had the advantage in home runs allowed (0.17 per nine innings vs 0.54). By the career numbers, Justin Topa 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.