George Frazier vs. Frank Hafner — Career Comparison

On the career pitching numbers, George Frazier posted a stronger line than Frank Hafner. George Frazier posted stronger numbers in ERA (4.2 vs 7) and WHIP (1.501 vs 2.222). By the career numbers, George Frazier 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.