John Perkovich vs. George Ziegler — Career Comparison

Looking at the career totals, John Perkovich and George Ziegler are fairly close on the surface numbers. John Perkovich posted stronger numbers in ERA (7.2 vs 10.5) and WHIP (1.600 vs 2.000). George Ziegler had the advantage in home runs allowed (0 per nine innings vs 5.4). By the career numbers, John Perkovich 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.