John Firth vs. Aaron Looper — Career Comparison

Looking at the career totals, John Firth and Aaron Looper are fairly close on the surface numbers. Aaron Looper posted stronger numbers in ERA (5.14 vs 8) and WHIP (1.286 vs 2.111). John Firth had the advantage in home runs allowed (0 per nine innings vs 1.29). By the career numbers, Aaron Looper 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.