John Anderson vs. Ryan Rolison — Career Comparison

On the career pitching numbers, John Anderson posted a stronger line than Ryan Rolison. John Anderson posted stronger numbers in ERA (6.45 vs 7.02) and home runs allowed (1.21 per nine innings vs 2.34). By the career numbers, John Anderson 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.