Rolando Arrojo vs. Michael Grove — Career Comparison

On the career pitching numbers, Rolando Arrojo posted a stronger line than Michael Grove. Rolando Arrojo posted stronger numbers in ERA (4.55 vs 5.48) and home runs allowed (1.07 per nine innings vs 1.45). 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.