Red Callender (1923–1999) was an influential American jazz double bassist and composer, known for his significant contributions to the bebop and cool jazz movements. Born in New Orleans, Louisiana, he later moved to Los Angeles, where he became a prominent figure in the West Coast jazz scene. Callender's notable works include collaborations with legendary artists such as Charlie Parker, Billie Holiday, and Chet Baker. He was a member of the pioneering jazz group, the "Jazz at the Philharmonic," and played on various seminal recordings, including those with artists like Dexter Gordon and Stan Getz. His composition “Bebop Blues” reflects his innovative approach to jazz. In addition to his performance career, Callender was an educator, sharing his knowledge with younger generations of musicians. His style blended elements of traditional jazz with the evolving sounds of modern jazz, influencing many players in the genre. Callender's work not only showcased the versatility of the double bass but also helped bridge the gap between different jazz idioms, solidifying his legacy in the history of American music.