Rolando Arrojo vs. Jeriome Robertson — Career Comparison

On the career pitching numbers, Rolando Arrojo posted a stronger line than Jeriome Robertson. Rolando Arrojo posted stronger numbers in ERA (4.55 vs 5.71) and WHIP (1.407 vs 1.660). 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.