David Hess vs. Joe Willis — Career Comparison

On the career pitching numbers, Joe Willis posted a stronger line than David Hess. Joe Willis posted stronger numbers in ERA (4.63 vs 6.25) and home runs allowed (0.17 per nine innings vs 2.61). By the career numbers, Joe Willis 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.