Roy Thomas vs. William Zay — Career Comparison

Looking at the career totals, Roy Thomas and William Zay are fairly close on the surface numbers. Roy Thomas posted stronger numbers in ERA (3.82 vs 9) and WHIP (1.455 vs 4.000). William Zay had the advantage in home runs allowed (0 per nine innings vs 0.71). By the career numbers, Roy Thomas 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.