Jack Leiter vs. Barry Zito — Career Comparison

On the career pitching numbers, Barry Zito posted a stronger line than Jack Leiter. Barry Zito posted stronger numbers in ERA (4.04 vs 4.8) and home runs allowed (0.98 per nine innings vs 1.2). 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.