Thomas Hatch vs. Troy Percival — Career Comparison

On the career pitching numbers, Troy Percival posted a stronger line than Thomas Hatch. Troy Percival posted stronger numbers in ERA (3.17 vs 5.24) and WHIP (1.143 vs 1.621). By the career numbers, Troy Percival 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.