Weldon Leo "Jack" Teagarden (August 20, 1905 – January 15, 1964), known as "Big T" and "The Swingin' Gate", was a jazz trombonist, bandleader, composer, and vocalist, regarded as the "Father of Jazz Trombone". Born in Vernon, Texas, his brothers Charlie and Clois "Cub" and his sister Norma also became noted professional musicians. Teagarden's father was an amateur brass band trumpeter and started young Jack on baritone horn; by age seven he had switched to trombone. He first heard jazz music played by the Louisiana Five and decided to play in the new style.

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