Spencer Arrighetti vs. Unknown Hamilton — Career Comparison

Looking at the career totals, Spencer Arrighetti and Unknown Hamilton are fairly close on the surface numbers. Spencer Arrighetti posted stronger numbers in ERA (4.69 vs 8.1) and WHIP (1.409 vs 2.400). Unknown Hamilton had the advantage in home runs allowed (0 per nine innings vs 1.35). By the career numbers, Spencer Arrighetti 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.