Clinton Dillard Castleberry Jr. (October 10, 1923 – November 7, 1944) was an American college football player in 1942, a halfback for the Georgia Tech Yellow Jackets. Future head coach Bobby Dodd, then an assistant, said that if Castleberry had lived to finish his playing career “he’d have probably been an All-American for three years and been the greatest back in Georgia Tech history.”
College football
Castleberry showed extraordinary ability as a Georgia Tech "pony" back, standing at only and weighing only . At Boys High School in Atlanta, he averaged 171 rushing yards per game and scored 102 points. In 1942, freshmen were ruled eligible to play varsity ball as college rosters were drained by World War II, which allowed Castleberry to display his spectacular prowess early. On October 3, 1942, Georgia Tech beat Notre Dame for the first time since 1928, especially impressive as the game was played in South Bend and Notre Dame had not lost a game in two years. Castleberry led Georgia Tech in both passing and rushing yards, even after Notre Dame head coach Frank Leahy had been warned by a scout that Castleberry was "the most dangerous runner in America."
Against national power Navy, Castleberry led Tech to an impressive shutout win on October 24<!--, 1942--> in Annapolis, broadcast worldwide via the Armed Forces Radio Network. The momentum changer of the game occurred when Navy was driving for a score near the Tech goal line. Castleberry was put in to play defense on a passing situation on fourth down. He anticipated the Navy pass and stepped in front of the intended receiver for an interception. He scampered away with a dazzling run of 95 yards for a touchdown. Tech coach Bobby Dodd described it as “a magnificent run that I can still follow step by step in my mind. It shook Navy to its keel, and Tech won 21-0.” Dodd called it Castleberry's greatest play. The national press began to take notice of Castleberry.
Georgia Tech won its first nine games and climbed to a top five national ranking. During that ninth win, Castleberry injured his knee in a hard-fought 20–7 win over Florida in Atlanta. Despite the injury, Castleberry played in the final two games of the season, but not quite at full speed, and Georgia Tech dropped both. On New Year's Day, Tech traveled to the Cotton Bowl in Dallas, but lost a tight game to Texas, 14–7. Castleberry's injury improved for the bowl game, yet he was still not quite a hundred percent and the team finished at 9–2.
Castleberry was third in the Heisman Trophy voting, behind winner Frank Sinkwich of Georgia and runner-up Paul Governali of Columbia, both seniors. This was the highest a freshman had ever placed in the Heisman voting. Castleberry's number 19 is the only football jersey Georgia Tech has ever retired. after a Royal Air Force plane observed unidentified wreckage believed to have been from the missing planes.