Tom Butters vs. Diego Moreno — Career Comparison

Looking at the career totals, Tom Butters and Diego Moreno are fairly close on the surface numbers. Tom Butters posted stronger numbers in ERA (3.1 vs 5.06) and home runs allowed (0.56 per nine innings vs 1.13). Diego Moreno had the advantage in WHIP (1.250 vs 1.453). By the career numbers, Tom Butters 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.