Rolando Arrojo vs. Emmett O'Neill — Career Comparison

Looking at the career totals, Rolando Arrojo and Emmett O'Neill are fairly close on the surface numbers. Rolando Arrojo posted stronger numbers in ERA (4.55 vs 4.76) and WHIP (1.407 vs 1.709). Emmett O'Neill had the advantage in home runs allowed (0.35 per nine innings vs 1.07). By the career numbers, Rolando Arrojo 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.