Oswaldo Mairena vs. Roy Smith — Career Comparison

Looking at the career totals, Oswaldo Mairena and Roy Smith are fairly close on the surface numbers. Roy Smith posted stronger numbers in ERA (5.24 vs 6.06) and home runs allowed (1.61 per nine innings vs 2.02). Oswaldo Mairena had the advantage in WHIP (1.654 vs 1.970). By the career numbers, Roy Smith 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.