Paul Clemens vs. Barry Zito — Career Comparison

On the career pitching numbers, Barry Zito posted a stronger line than Paul Clemens. Barry Zito posted stronger numbers in ERA (4.04 vs 4.89) and WHIP (1.357 vs 1.500). By the career numbers, Barry Zito 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.