Zach McClellan vs. Tom Thomas — Career Comparison

Looking at the career totals, Zach McClellan and Tom Thomas are fairly close on the surface numbers. Tom Thomas posted stronger numbers in ERA (3.31 vs 5.79) and WHIP (1.355 vs 1.929). Zach McClellan had the advantage in home runs allowed (0 per nine innings vs 0.52). By the career numbers, Tom Thomas 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.