Frank Hafner vs. Kevin Whelan — Career Comparison

On the career pitching numbers, Frank Hafner posted a stronger line than Kevin Whelan. Frank Hafner posted stronger numbers in ERA (7 vs 9) and WHIP (2.222 vs 3.333). By the career numbers, Frank Hafner 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.