Spencer Arrighetti vs. Andy Sonnanstine — Career Comparison

Looking at the career totals, Spencer Arrighetti and Andy Sonnanstine are fairly close on the surface numbers. Spencer Arrighetti had the edge in ERA (4.69 vs 5.26). 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.