Unknown Hayes vs. Wilson Heredia — Career Comparison

Looking at the career totals, Unknown Hayes and Wilson Heredia are fairly close on the surface numbers. Unknown Hayes posted stronger numbers in WHIP (1.385 vs 1.768) and home runs allowed (0 per nine innings vs 1.14). Wilson Heredia had the advantage in ERA (3.41 vs 6.23). By the career numbers, Unknown Hayes 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.