Len Perme vs. Zack Weiss — Career Comparison

On the career pitching numbers, Len Perme posted a stronger line than Zack Weiss. Len Perme posted stronger numbers in ERA (3.12 vs 4.61) and home runs allowed (0 per nine innings vs 2.63). By the career numbers, Len Perme 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.