Cruz is also a punk rock musician, having sung for bands such as Dr. Know and the reunited version of the Dead Kennedys.

"[6] Cruz is the last living cast member of the series following co-star Kristina Holland’s death in 2023.

Cruz continued as a child actor for several years following the cancellation of The Courtship of Eddie's Father with a number of guest appearances in television shows like Kung Fu, Gunsmoke, and The Incredible Hulk—which reunited him on-screen with Bixby.

Cruz also played the role of Joey Turner in the 1976 movie The Bad News Bears.

Cruz has worked behind-the-scenes in television and film, such as an assistant editor on the animated series South Park.