Oscar Ray Grimes, Jr. (April 13, 1915 – May 19, 1993) was a utility infielder in Major League Baseball who played for the Cleveland Indians (1938–1942), New York Yankees (1943–1946) and Philadelphia Athletics (1946). Grimes batted and threw right-handed.

He was born in Minerva, Ohio.

In a nine-season career, Grimes posted a .256 batting average with 18 home runs and 200 RBI in 602 games played.

Grimes died in Westlake, Ohio, at the age of 78.

His father Ray Grimes and his uncle Roy Grimes also played in the major leagues.