John McDonald vs. Ryan O'Rourke — Career Comparison

Looking at the career totals, John McDonald and Ryan O'Rourke are fairly close on the surface numbers. Ryan O'Rourke posted stronger numbers in ERA (4.84 vs 9) and WHIP (1.324 vs 2.333). John McDonald had the advantage in home runs allowed (0 per nine innings vs 1.12). By the career numbers, Ryan O'Rourke 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.