Bartolo Colon vs. Bill Williams — Career Comparison

On the career pitching numbers, Bartolo Colon posted a stronger line than Bill Williams. Bartolo Colon posted stronger numbers in ERA (4.12 vs 5.06) and home runs allowed (1.14 per nine innings vs 1.69). By the career numbers, Bartolo Colon 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.