Bill Fischer vs. Williams Perez — Career Comparison

On the career pitching numbers, Bill Fischer posted a stronger line than Williams Perez. Bill Fischer posted stronger numbers in ERA (4.34 vs 5.18) and WHIP (1.413 vs 1.515). By the career numbers, Bill Fischer 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.