Lou Gehrig starred a a "B" movie western at least once in his career, but you are probably referring to Chuck Connors, who play firstbase in the majors for the Brooklyn Dodgers and Chicago Cubs in the late '50s and early '60s, but is best known for his role on the TV series "The Rifleman".
Chuck Conners who played for the Brooklyn Dodgers and Chicago Cubs became an actor and starred in the TV series "The Rifleman".
It already starred.
MLB player Curtis Granderson throws right.
MLB player Adam LaRoche bats left.
MLB player Aaron Loup throws left.
MLB player Jose Ramirez can bat right or left (i.e. he is a switch hitter).
MLB player Brian McCann throws right.
MLB player Abraham Almonte throws right.
MLB player Bryan Holaday bats right.
MLB player Anthony Rizzo throws left.
MLB player Arquimedes Caminero bats right.
MLB player Brock Holt bats left.