John Thomas Wyatt (April 19, 1934 – April 6, 1998) was an American professional baseball pitcher.
He played all or part of nine seasons in Major League Baseball (MLB), primarily as a relief pitcher.
From 1961 through 1969, he played for the Kansas City Athletics (1961–66), Boston Red Sox (1966–68), New York Yankees (1968), Detroit Tigers (1968) and Oakland Athletics (1969).
In the Negro leagues, he played for the Indianapolis Clowns (1953–55).
Wyatt batted and threw right-handed.
Wyatt saved John O'Donoghue's first big league win, coming at Dodger Stadium on May 12, 1964.