[1] "He played piano, banjo, and ukulele in a family band before taking up C-melody, tenor, and finally alto saxophone.
[1] He joined the Count Basie Orchestra in 1937, playing baritone and alto saxophones initially, and then being lead altoist and occasional clarinettist and vocalist until 1945.
[1] Warren appeared in Born to Swing, the 1972 film about former members of Basie's band.
[1] From 1973, Warren performed often at the West End jazz club in New York City, leading a band called The Countsmen.
[1] He lived part of the time in Switzerland until his return to Springfield in 1992, where he spent the final two years of his life.