Stanley Aaron Wentzel (January 13, 1917 – November 28, 1991) was an American professional baseball player.

He threw and batted right-handed, stood 6 feet 1 inch (1.85 m) tall and weighed 200 pounds (91 kg).

Wentzel is one of many ball players who only appeared in the Major Leagues during the World War II period.

After batting .321 with the Indianapolis Indians of the top-level American Association — where he was named an All-Star and the league's Most Valuable Player — he was called up by Boston and started four games for the Braves in the last week of the season, all against the New York Giants.

Wentzel returned to Indianapolis for 1946 and after that season, on September 30, he was included in a multiplayer trade that sent him to the Pittsburgh Pirates with future Hall of Fame second baseman Billy Herman, pitcher Elmer Singleton and infielder Whitey Wietelmann for third baseman Bob Elliott and catcher Hank Camelli.