Jarrett Grube vs. Willis Roberts — Career Comparison

On the career pitching numbers, Willis Roberts posted a stronger line than Jarrett Grube. Willis Roberts posted stronger numbers in ERA (4.64 vs 13.5) and home runs allowed (0.94 per nine innings vs 13.5). By the career numbers, Willis Roberts 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.