Frank Hafner vs. B. J. Ryan — Career Comparison

On the career pitching numbers, B. J. Ryan posted a stronger line than Frank Hafner. B. J. Ryan posted stronger numbers in ERA (3.37 vs 7) and WHIP (1.332 vs 2.222). By the career numbers, B. J. Ryan 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.