Don Cooper vs. Hipolito Peña — Career Comparison

On the career pitching numbers, Hipolito Peña posted a stronger line than Don Cooper. Hipolito Peña posted stronger numbers in ERA (4.84 vs 5.27) and WHIP (1.572 vs 1.723). By the career numbers, Hipolito Peña 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.