Joe Boyle vs. Frank Sullivan — Career Comparison

On the career pitching numbers, Frank Sullivan posted a stronger line than Joe Boyle. Frank Sullivan posted stronger numbers in ERA (3.6 vs 4.98) and WHIP (1.323 vs 1.444). By the career numbers, Frank Sullivan 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.