Jack Aker vs. John Doyle — Career Comparison

Looking at the career totals, Jack Aker and John Doyle are fairly close on the surface numbers. John Doyle posted stronger numbers in ERA (2.63 vs 3.28) and home runs allowed (0 per nine innings vs 0.77). Jack Aker had the advantage in WHIP (1.369 vs 1.833). By the career numbers, John Doyle 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.