Bill Johnson vs. Willis Roberts — Career Comparison

On the career pitching numbers, Bill Johnson posted a stronger line than Willis Roberts. Bill Johnson posted stronger numbers in ERA (3.57 vs 4.64) and home runs allowed (0 per nine innings vs 0.94). By the career numbers, Bill Johnson 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.