Horace Fenner vs. George Mack — Career Comparison

Looking at the career totals, Horace Fenner and George Mack are fairly close on the surface numbers. George Mack posted stronger numbers in ERA (7.19 vs 7.71) and WHIP (1.890 vs 2.429). Horace Fenner had the advantage in home runs allowed (0 per nine innings vs 1.05). By the career numbers, George Mack 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.