Kent William Hadley (December 17, 1934 – March 10, 2005) was an American professional baseball player.

That December he was part of the trade that sent Roger Maris from Kansas City to the New York Yankees.

The Hawks brought him back in 1963 and he improved drastically, cranking out 30 long balls and batting .295/.341/.517 with 84 RBI.

He hit a dramatic game-ending game-winning home run in game 4 of the Japan Series that year, taking Minoru Murayama deep.

Hadley said one of the proudest parts of his career was playing for Rod Dedeaux, Casey Stengel and Kazuto Tsuruoka, a famous trio of managers in different settings.