David Robertson vs. Leon Williams — Career Comparison

Looking at the career totals, David Robertson and Leon Williams are fairly close on the surface numbers. David Robertson posted stronger numbers in ERA (2.93 vs 5.4) and WHIP (1.204 vs 2.160). Leon Williams had the advantage in home runs allowed (0 per nine innings vs 0.82). By the career numbers, David Robertson 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.