Ed Foster vs. Mutt Williams — Career Comparison

On the career pitching numbers, Ed Foster posted a stronger line than Mutt Williams. Ed Foster posted stronger numbers in ERA (2.14 vs 4.91) and home runs allowed (0.43 per nine innings vs 0.82). By the career numbers, Ed Foster 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.