John Rocker vs. Justin Thomas — Career Comparison

On the career pitching numbers, John Rocker posted a stronger line than Justin Thomas. John Rocker posted stronger numbers in ERA (3.42 vs 6.93) and WHIP (1.492 vs 2.149). By the career numbers, John Rocker 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.