John Perkovich vs. John Rooney — Career Comparison

Looking at the career totals, John Perkovich and John Rooney are fairly close on the surface numbers. John Rooney posted stronger numbers in ERA (6.75 vs 7.2) and WHIP (1.500 vs 1.600). John Perkovich had the advantage in home runs allowed (5.4 per nine innings vs 6.75). By the career numbers, John Rooney 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.