Marty Bystrom vs. David Williams — Career Comparison

On the career pitching numbers, Marty Bystrom posted a stronger line than David Williams. Marty Bystrom posted stronger numbers in ERA (4.26 vs 4.83) and home runs allowed (0.58 per nine innings vs 1.41). By the career numbers, Marty Bystrom 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.