Rolando Arrojo vs. Don Kaiser — Career Comparison

Looking at the career totals, Rolando Arrojo and Don Kaiser are fairly close on the surface numbers. Don Kaiser posted stronger numbers in ERA (4.15 vs 4.55) and home runs allowed (0.79 per nine innings vs 1.07). Rolando Arrojo had the advantage in WHIP (1.407 vs 1.458). By the career numbers, Don Kaiser 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.