John Callahan vs. Ryan Thompson — Career Comparison

On the career pitching numbers, Ryan Thompson posted a stronger line than John Callahan. Ryan Thompson posted stronger numbers in ERA (3.54 vs 16.2) and WHIP (1.210 vs 3.000). By the career numbers, Ryan Thompson 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.