Bill Nelson vs. John Perkovich — Career Comparison

On the career pitching numbers, Bill Nelson posted a stronger line than John Perkovich. Bill Nelson posted stronger numbers in ERA (4.5 vs 7.2) and WHIP (1.308 vs 1.600). By the career numbers, Bill Nelson 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.