Jack Aker vs. Bill Nelson — Career Comparison

Looking at the career totals, Jack Aker and Bill Nelson are fairly close on the surface numbers. Bill Nelson posted stronger numbers in WHIP (1.308 vs 1.369) and home runs allowed (0.35 per nine innings vs 0.77). Jack Aker had the advantage in ERA (3.28 vs 4.5). By the career numbers, Bill Nelson 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.