Vern Olsen vs. Otto Rettig — Career Comparison

Looking at the career totals, Vern Olsen and Otto Rettig are fairly close on the surface numbers. Vern Olsen posted stronger numbers in ERA (3.4 vs 4.91) and WHIP (1.432 vs 1.636). Otto Rettig had the advantage in home runs allowed (0 per nine innings vs 0.31). By the career numbers, Vern Olsen 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.