John Callahan vs. Luther Hackman — Career Comparison

On the career pitching numbers, Luther Hackman posted a stronger line than John Callahan. Luther Hackman posted stronger numbers in ERA (5.09 vs 16.2) and WHIP (1.590 vs 3.000). By the career numbers, Luther Hackman 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.