Mark Grater vs. Willis Roberts — Career Comparison

Looking at the career totals, Mark Grater and Willis Roberts are fairly close on the surface numbers. Mark Grater posted stronger numbers in ERA (3.38 vs 4.64) and home runs allowed (0 per nine innings vs 0.94). Willis Roberts had the advantage in WHIP (1.521 vs 2.250). By the career numbers, Mark Grater 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.