Bill Butler vs. Red Ruffing — Career Comparison

On the career pitching numbers, Red Ruffing posted a stronger line than Bill Butler. Red Ruffing posted stronger numbers in ERA (3.8 vs 4.21) and WHIP (1.341 vs 1.479). By the career numbers, Red Ruffing 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.