Zach McClellan vs. Darren O'Day — Career Comparison

Looking at the career totals, Zach McClellan and Darren O'Day are fairly close on the surface numbers. Darren O'Day posted stronger numbers in ERA (2.59 vs 5.79) and WHIP (1.074 vs 1.929). Zach McClellan had the advantage in home runs allowed (0 per nine innings vs 0.95). By the career numbers, Darren O'Day 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.