Unknown Hayes vs. Dan Petry — Career Comparison

Looking at the career totals, Unknown Hayes and Dan Petry are fairly close on the surface numbers. Dan Petry posted stronger numbers in ERA (3.95 vs 7.71) and WHIP (1.399 vs 2.786). Unknown Hayes had the advantage in home runs allowed (0 per nine innings vs 0.94). By the career numbers, Dan Petry 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.