Thomas Francis "Tommy" Dorsey, Jr. (November 19, 1905 - November 26, 1956) was an American jazz trombonist, trumpeter, composer, and bandleader of the Big Band era. He was known as "The Sentimental Gentleman of Swing", because of his smooth-toned trombone playing. Although he was not known for being a notable soloist, his technical skill on the trombone gave him renown amongst other musicians. He was the younger brother of bandleader Jimmy Dorsey.