Matt Duff vs. John Perkovich — Career Comparison

Looking at the career totals, Matt Duff and John Perkovich are fairly close on the surface numbers. Matt Duff posted stronger numbers in ERA (4.76 vs 7.2) and home runs allowed (0 per nine innings vs 5.4). John Perkovich had the advantage in WHIP (1.600 vs 2.294). By the career numbers, Matt Duff 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.