Willis Roberts vs. Al Severinsen — Career Comparison

On the career pitching numbers, Al Severinsen posted a stronger line than Willis Roberts. Al Severinsen posted stronger numbers in ERA (3.08 vs 4.64) and home runs allowed (0.57 per nine innings vs 0.94). By the career numbers, Al Severinsen 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.