Rudy Hernandez vs. John Perkovich — Career Comparison

On the career pitching numbers, Rudy Hernandez posted a stronger line than John Perkovich. Rudy Hernandez posted stronger numbers in ERA (4.12 vs 7.2) and home runs allowed (0.41 per nine innings vs 5.4). By the career numbers, Rudy Hernandez 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.