Alberto Arias vs. Willis Roberts — Career Comparison

Looking at the career totals, Alberto Arias and Willis Roberts are fairly close on the surface numbers. Alberto Arias posted stronger numbers in ERA (3.74 vs 4.64) and home runs allowed (0.36 per nine innings vs 0.94). Willis Roberts had the advantage in WHIP (1.521 vs 1.580). By the career numbers, Alberto Arias 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.