Jim Peterson vs. Thad Tillotson — Career Comparison

On the career pitching numbers, Thad Tillotson posted a stronger line than Jim Peterson. Thad Tillotson posted stronger numbers in ERA (4.06 vs 5.27) and WHIP (1.482 vs 1.665). By the career numbers, Thad Tillotson 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.