Frank Keffer vs. Joe Rock — Career Comparison

Looking at the career totals, Frank Keffer and Joe Rock are fairly close on the surface numbers. Joe Rock posted stronger numbers in ERA (2.35 vs 5.63) and WHIP (1.174 vs 1.500). Frank Keffer had the advantage in home runs allowed (0 per nine innings vs 1.17). By the career numbers, Joe Rock 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.