John Rocker vs. Grant Thatcher — Career Comparison

On the career pitching numbers, Grant Thatcher posted a stronger line than John Rocker. Grant Thatcher posted stronger numbers in ERA (3.16 vs 3.42) and WHIP (1.378 vs 1.492). By the career numbers, Grant Thatcher 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.