Michael Kelly vs. Frank Mack — Career Comparison

Looking at the career totals, Michael Kelly and Frank Mack are fairly close on the surface numbers. Michael Kelly posted stronger numbers in ERA (3.04 vs 4.94) and WHIP (1.287 vs 1.732). Frank Mack had the advantage in home runs allowed (0.38 per nine innings vs 0.79). By the career numbers, Michael Kelly 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.