Luis Arroyo vs. Frank Keffer — Career Comparison

Looking at the career totals, Luis Arroyo and Frank Keffer are fairly close on the surface numbers. Luis Arroyo posted stronger numbers in ERA (3.93 vs 5.63) and WHIP (1.440 vs 1.500). Frank Keffer had the advantage in home runs allowed (0 per nine innings vs 0.98). By the career numbers, Luis Arroyo 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.