Bob Gibson vs. Bump Hadley — Career Comparison

On the career pitching numbers, Bob Gibson posted a stronger line than Bump Hadley. Bob Gibson posted stronger numbers in ERA (2.91 vs 4.24) and WHIP (1.218 vs 1.501). By the career numbers, Bob Gibson 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.