Robbie Erlin vs. Bob Katz — Career Comparison

On the career pitching numbers, Bob Katz posted a stronger line than Robbie Erlin. Bob Katz posted stronger numbers in ERA (3.93 vs 4.87) and home runs allowed (0 per nine innings vs 1.13). By the career numbers, Bob Katz 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.