Roy Thomas vs. Don Williams — Career Comparison

On the career pitching numbers, Roy Thomas posted a stronger line than Don Williams. Roy Thomas posted stronger numbers in ERA (3.82 vs 10.38) and WHIP (1.455 vs 3.231). 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.