Unknown Hamilton vs. Rich Robertson — Career Comparison

Looking at the career totals, Unknown Hamilton and Rich Robertson are fairly close on the surface numbers. Rich Robertson posted stronger numbers in ERA (4.94 vs 8.1) and WHIP (1.631 vs 2.400). Unknown Hamilton had the advantage in home runs allowed (0 per nine innings vs 0.92). By the career numbers, Rich Robertson 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.