Mike Duvall vs. Frank Keffer — Career Comparison

Looking at the career totals, Mike Duvall and Frank Keffer are fairly close on the surface numbers. Frank Keffer posted stronger numbers in WHIP (1.500 vs 1.863) and home runs allowed (0 per nine innings vs 1.06). Mike Duvall had the advantage in ERA (4.76 vs 5.63). By the career numbers, Frank Keffer 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.