Doug Fister vs. Bruce Zimmermann — Career Comparison

On the career pitching numbers, Doug Fister posted a stronger line than Bruce Zimmermann. Doug Fister posted stronger numbers in ERA (3.72 vs 5.64) and WHIP (1.267 vs 1.460). By the career numbers, Doug Fister 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.