Mike DeJean vs. John Perkovich — Career Comparison

On the career pitching numbers, Mike DeJean posted a stronger line than John Perkovich. Mike DeJean posted stronger numbers in ERA (4.3 vs 7.2) and home runs allowed (0.85 per nine innings vs 5.4). By the career numbers, Mike DeJean 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.