Bill Donovan vs. Jack Flaherty — Career Comparison

On the career pitching numbers, Bill Donovan posted a stronger line than Jack Flaherty. Bill Donovan posted stronger numbers in ERA (2.69 vs 3.8) and home runs allowed (0.09 per nine innings vs 1.23). By the career numbers, Bill Donovan 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.