Paul Clemens vs. Daisuke Matsuzaka — Career Comparison

On the career pitching numbers, Daisuke Matsuzaka posted a stronger line than Paul Clemens. Daisuke Matsuzaka posted stronger numbers in ERA (4.45 vs 4.89) and WHIP (1.413 vs 1.500). By the career numbers, Daisuke Matsuzaka 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.