As manager Theodore Roosevelt "Double Duty" Radcliffe (July 7, 1902 – August 11, 2005) was a professional baseball player in the Negro leagues.

An accomplished two-way player, he played as a pitcher and a catcher, became a manager, and in his old age became a popular ambassador for the game.

Newspaperman Damon Runyon coined the nickname "Double Duty" because Radcliffe played as a catcher and as a pitcher in the successive games of a 1932 doubleheader between the Pittsburgh Crawfords and the New York Black Yankees.

The boys played baseball using a taped ball of rags with their friends including future Negro league All-Star ballplayers Leroy "Satchel" Paige and Bobby Robinson.

After a brief tenure with the Detroit Stars, Radcliffe played for the St. Louis Stars (1930), Homestead Grays (1931), Pittsburgh Crawfords (1932), Columbus Blue Birds (1933), New York Black Yankees, Brooklyn Eagles, Cincinnati Tigers, Memphis Red Sox, Birmingham Black Barons, Chicago American Giants, Louisville Buckeyes and Kansas City Monarchs.

Ty Cobb reported that Radcliffe wore a chest protector that said "thou shalt not steal" during one exhibition game.

Biographer Kyle P. McNary estimates that Radcliffe had a .303 batting average, 4,000 hits and 400 homers in 36 years in the game (see Baseball statistics).

[2] Standing 5 ft 9 in and weighing 210 pounds (95 kg) Radcliffe had a strong throwing arm, good catching reflexes and great cunning.

Radcliffe and his close friend Satchel Paige were easily persuaded to change sides by offers of higher earnings and both moved frequently.

Radcliffe's team won two games out of three before Foxx was hit on the head by a Chet Brewer pitch and the tour cancelled.

[2] In the next season, Radcliffe had trouble securing his release from the Brooklyn Eagles of the Negro leagues, but on June 21 he joined the integrated Bismarck Churchills.

Other Negro leaguers on the team included Chet Brewer, Hilton Smith, Barney Morris and Quincy Trouppe.

"[2] After leaving baseball, Radcliffe and his wife returned to a life of poverty until 1990, when they were robbed and beaten in their housing project on Chicago's South Side.

[4] Writer Kyle McNary met Radcliffe in 1992 when he was trying to learn more about black baseball in his home town of Bismarck, North Dakota.

He received the state of Illinois Historical Committee's Lifetime Achievement Award and was honored by Mayor Richard Daley as an outstanding citizen of Chicago.

[5] In 1997, Radcliffe was inducted into the "Yesterday's Negro League Baseball Players Wall of Fame" at County Stadium in Milwaukee.

After his 100th birthday, Double Duty celebrated each year by throwing a ceremonial first pitch for the Chicago White Sox at U.S. Cellular Field.