Anthony Celestino was the touring bassist for the blink-182 side project, Box Car Racer. Although guitarist and vocalist Tom DeLonge composed and recorded all the bass guitar on Box Car Racer, Anthony is seen playing bass in the "I Feel So" and "There Is" music videos and toured with them on their only world tour. Celestino became a member of Box Car Racer after drummer Travis Barker mentioned the project to Celestino, who showed interest in auditioning. They had previously discussed collaborating on a musical project.

Celestino was formerly the bassist for Probably a Load.