Chandler Shepherd vs. George Zettlein — Career Comparison

On the career pitching numbers, George Zettlein posted a stronger line than Chandler Shepherd. George Zettlein posted stronger numbers in ERA (2.55 vs 6.63) and WHIP (1.297 vs 1.526). By the career numbers, George Zettlein 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.