Ron Nischwitz vs. John Perkovich — Career Comparison

On the career pitching numbers, Ron Nischwitz posted a stronger line than John Perkovich. Ron Nischwitz posted stronger numbers in ERA (4.21 vs 7.2) and WHIP (1.535 vs 1.600). By the career numbers, Ron Nischwitz 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.