David Aardsma vs. Dale Matthewson — Career Comparison

On the career pitching numbers, Dale Matthewson posted a stronger line than David Aardsma. Dale Matthewson posted stronger numbers in WHIP (1.328 vs 1.487) and home runs allowed (0.31 per nine innings vs 1.09). By the career numbers, Dale Matthewson 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.