Bob Groom vs. Bump Hadley — Career Comparison

On the career pitching numbers, Bob Groom posted a stronger line than Bump Hadley. Bob Groom posted stronger numbers in ERA (3.1 vs 4.24) and WHIP (1.279 vs 1.501). By the career numbers, Bob Groom 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.