Zach Jackson vs. Paul McClellan — Career Comparison

Looking at the career totals, Zach Jackson and Paul McClellan are fairly close on the surface numbers. Paul McClellan posted stronger numbers in ERA (5.26 vs 5.81) and WHIP (1.449 vs 1.566). Zach Jackson had the advantage in home runs allowed (1.28 per nine innings vs 1.72). By the career numbers, Paul McClellan 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.