John Callahan vs. John McCarty — Career Comparison

On the career pitching numbers, John McCarty posted a stronger line than John Callahan. John McCarty posted stronger numbers in ERA (3.91 vs 16.2) and WHIP (1.738 vs 3.000). By the career numbers, John McCarty 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.