Stanley Charles Keyes (September 9, 1898 – April 1976) was an American baseball outfielder who spent 17 seasons in the minor leagues, from 1924 to 1940.
He began his career with the Rock Island Islanders, hitting .358 with a .624 slugging percentage, 20 home runs, 39 doubles and 10 triples to lead the Mississippi Valley League in home runs, slugging percentage and total bases (279).
He also went hitless in a game with the Waco Cubs, bringing his season batting average to .322 and his slugging mark to .629.
In 1928, back with the Tourists, he hit .330 with a .535 slugging percentage, 15 home runs, 19 triples and 30 doubles in 147 games and was named to the South Atlantic League All-Star team.
Despite spending more than a third of his season elsewhere, he still led the South Atlantic League in batting average and slugging percentage.
He tied Elliot Bigelow for the Southern Association league lead in games played and was the sole leader in home runs and total bases.
With the Augusta Tigers in 1938, he hit .320 with seven home runs in 134 games; he followed that with a .333 batting average and .535 slugging mark in 82 matches split between the Macon Peaches and Portsmouth Cubs in 1939.