Wei-Yin Chen vs. Bill Williams — Career Comparison

On the career pitching numbers, Wei-Yin Chen posted a stronger line than Bill Williams. Wei-Yin Chen posted stronger numbers in ERA (4.18 vs 5.06) and home runs allowed (1.32 per nine innings vs 1.69). By the career numbers, Wei-Yin Chen 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.