Brian Powell vs. Ariel Prieto — Career Comparison

Looking at the career totals, Brian Powell and Ariel Prieto are fairly close on the surface numbers. Ariel Prieto posted stronger numbers in ERA (4.85 vs 5.94) and home runs allowed (0.87 per nine innings vs 1.84). Brian Powell had the advantage in WHIP (1.580 vs 1.675). By the career numbers, Ariel Prieto 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.