Frank Castillo vs. Ed Klepfer — Career Comparison

On the career pitching numbers, Ed Klepfer posted a stronger line than Frank Castillo. Ed Klepfer posted stronger numbers in ERA (2.81 vs 4.56) and WHIP (1.327 vs 1.378). By the career numbers, Ed Klepfer 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.