Dayan Diaz vs. Dale Matthewson — Career Comparison

On the career pitching numbers, Dale Matthewson posted a stronger line than Dayan Diaz. Dale Matthewson posted stronger numbers in ERA (4.34 vs 9.15) and WHIP (1.328 vs 1.932). 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.