Robert Phillip Maier (September 5, 1915 – August 4, 1993) was a professional baseball player from 1937 to 1945.

[3] He was one of three Tigers with ten at bats in a 24-inning, 1–1 tie with the Philadelphia Athletics that season.

[5] Though he was the starting third baseman during the regular season, the starting job went to Jimmy Outlaw in the 1945 World Series, as Outlaw moved from the outfield to third base to make room for Hank Greenberg who had returned from military service late in the season.

Maier appeared in Game 6 of the World Series as a pinch hitter for catcher Paul Richards.

Maier was replaced as the Tigers starting third baseman in 1946 by future Hall of Famer George Kell.