Josh Butler vs. Tim Peterson — Career Comparison

Looking at the career totals, Josh Butler and Tim Peterson are fairly close on the surface numbers. Tim Peterson posted stronger numbers in ERA (5.91 vs 9) and WHIP (1.457 vs 3.250). Josh Butler had the advantage in home runs allowed (0 per nine innings vs 2.31). By the career numbers, Tim Peterson 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.