Casey Janssen vs. Zack Weiss — Career Comparison

On the career pitching numbers, Casey Janssen posted a stronger line than Zack Weiss. Casey Janssen posted stronger numbers in ERA (3.63 vs 4.61) and home runs allowed (0.88 per nine innings vs 2.63). By the career numbers, Casey Janssen 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.