Roger Nelson vs. Otto Rettig — Career Comparison

Looking at the career totals, Roger Nelson and Otto Rettig are fairly close on the surface numbers. Roger Nelson posted stronger numbers in ERA (3.06 vs 4.91) and WHIP (1.127 vs 1.636). Otto Rettig had the advantage in home runs allowed (0 per nine innings vs 0.62). By the career numbers, Roger 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.