Roy David Eldridge (January 30, 1911 – February 26, 1989) was a jazz trumpet player in the Swing era. His sophisticated use of harmony, including the use of tritone substitutions, resulted in him sometimes being seen as the link between Louis Armstrong-era swing music and Dizzy Gillespie-era bebop. Roy's rhythmic power to swing a band was a dynamic trademark of the Swing Era. Eldridge was born in Pittsburgh, Pennsylvania. His nickname was Little Jazz.