John Perkovich vs. Zack Weiss — Career Comparison

On the career pitching numbers, Zack Weiss posted a stronger line than John Perkovich. Zack Weiss posted stronger numbers in ERA (4.61 vs 7.2) and WHIP (1.280 vs 1.600). By the career numbers, Zack Weiss 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.