David Aardsma vs. Shae Simmons — Career Comparison

On the career pitching numbers, Shae Simmons posted a stronger line than David Aardsma. Shae Simmons posted stronger numbers in ERA (3.5 vs 4.27) and WHIP (1.139 vs 1.487). By the career numbers, Shae Simmons 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.