Joe Boyle vs. Roy Walker — Career Comparison

On the career pitching numbers, Roy Walker posted a stronger line than Joe Boyle. Roy Walker posted stronger numbers in ERA (3.99 vs 4.98) and home runs allowed (0.3 per nine innings vs 0.86). By the career numbers, Roy Walker 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.