From his Wikipedia:
He began on piano but was advised to switch to trombone due to his having a mild form of dyslexia. This condition did not hamper his music, and by fifteen he had turned professional. He played for Herb Pomeroy’s band from 1955 to 1957 and then toured with the Dorsey Brothers. In 1960 he was drafted into the U.S. Army and served on NORAD Band. Later, he worked with Woody Herman and in the 1960s wrote music for Buddy Rich. He formed an ensemble that became one of the most well-regarded college jazz bands.
