John Callahan vs. Jailen Peguero — Career Comparison

On the career pitching numbers, Jailen Peguero posted a stronger line than John Callahan. Jailen Peguero posted stronger numbers in ERA (7.5 vs 16.2) and WHIP (1.833 vs 3.000). By the career numbers, Jailen Peguero 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.