John Costello vs. John Ware — Career Comparison

Looking at the career totals, John Costello and John Ware are fairly close on the surface numbers. John Costello posted stronger numbers in ERA (2.97 vs 6) and WHIP (1.395 vs 3.000). John Ware had the advantage in home runs allowed (0 per nine innings vs 0.74). By the career numbers, John Costello 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.