Henry Keupper vs. Williams Perez — Career Comparison

On the career pitching numbers, Henry Keupper posted a stronger line than Williams Perez. Henry Keupper posted stronger numbers in ERA (4.27 vs 5.18) and WHIP (1.432 vs 1.515). By the career numbers, Henry Keupper 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.