James Riley Turner (August 6, 1903 – November 29, 1998) was an American pitcher and coach in Major League Baseball.

Most notably, he was pitching coach for the Yankees under Casey Stengel from 1949 to 1959, during which time they won seven titles.

He led the National League in earned run average and won 20 games in 1937 as a rookie with Boston.

Because he worked for his family's dairy farm in the offseason in Antioch, Tennessee, he was known as "Milkman Jim" to his fans.

Bouton claimed Turner (his pitching coach with the Yankees from 1966 to 1968) was a front-runner, who only wanted to be associated with successful pitchers.