John Allen vs. Zac Rosscup — Career Comparison

Looking at the career totals, John Allen and Zac Rosscup are fairly close on the surface numbers. Zac Rosscup posted stronger numbers in ERA (5.09 vs 18) and WHIP (1.673 vs 2.000). John Allen had the advantage in home runs allowed (0 per nine innings vs 1.66). By the career numbers, Zac Rosscup 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.