Frank Hafner vs. Ken Ray — Career Comparison

Looking at the career totals, Frank Hafner and Ken Ray are fairly close on the surface numbers. Ken Ray posted stronger numbers in ERA (5.13 vs 7) and WHIP (1.734 vs 2.222). Frank Hafner had the advantage in home runs allowed (1 per nine innings vs 1.25). By the career numbers, Ken Ray 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.