Thomas Michael Shannon (July 15, 1939 – April 29, 2023) was an American professional baseball third baseman and right fielder.

In 1964, he became the team's regular right fielder, shifting to third base (in order to make room for the newly acquired Roger Maris) in 1967.

He hit a game-tying two-run homer off Whitey Ford in Game 1 of the 1964 World Series against the New York Yankees, which St. Louis won 9–5.

For 1968, he batted .266 in 156 games, with 15 home runs and 79 RBIs; he finished in seventh place in voting for the NL Most Valuable Player Award, behind teammates Bob Gibson, Curt Flood, and Lou Brock, as well as Giants Willie McCovey and Juan Marichal, and Pete Rose of the Cincinnati Reds.

[10] In Game 3 of the 1967 World Series against the Boston Red Sox, Shannon hit a home run off Gary Bell.

For almost three decades Shannon was paired with Hall of Fame announcer Jack Buck on AM 1120 KMOX and the Cardinals Radio Network.

[12] Shannon received a local Emmy Award for his work on Cardinal broadcasts in 1985, and was inducted into the Missouri Sports Hall of Fame in 1999.

[21] Shannon contracted COVID-19 in October 2020, spending 15 days in the hospital, and being placed in a medically induced coma.