Jeff Nelson vs. John Perkovich — Career Comparison

On the career pitching numbers, Jeff Nelson posted a stronger line than John Perkovich. Jeff Nelson posted stronger numbers in ERA (3.41 vs 7.2) and WHIP (1.427 vs 1.600). By the career numbers, Jeff 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.