Ross Albert Grimsley Sr. [1] (June 4, 1922 – February 6, 1994) was an American Major League Baseball pitcher who appeared in 7 games for the Chicago White Sox in 1951.

Grimsley was signed by the St. Louis Cardinals before the 1948 season and then drafted by the Brooklyn Dodgers in the 1950 minor league draft.

Late in the 1951 season, his contract was purchased by the White Sox, where he made his only major league appearances during September of that season.

His son, also named Ross Grimsley, had an 11-year major league career.

This biographical article relating to an American baseball pitcher born in the 1920s is a stub.