[1] Renella acted in the stage play Bullfight, which opened at the Coronet Repertory Theatre on North La Cienega in West Hollywood on November 17, 1961.

Although there is not much written about him in the Los Angeles Times of the day, he was a working actor, mostly playing small parts as gangster types and hoods.

He then played the role as Claude Sadi in Dayton's Devils (1968) starring Rory Calhoun, Leslie Nielsen, and Lainie Kazan.

That same year, Renella played Johnny Ross, a Mafia supposed informant scheduled to testify in San Francisco, in Bullitt starring Steve McQueen, Robert Vaughn, and Jacqueline Bisset.

[2][3] Renella's guest appearances on television include the hit shows Route 66, Combat!, Planet of the Apes, Mannix, The High Chaparral, McCloud, The Rockford Files, The Streets of San Francisco, Hunter, The Dukes of Hazzard, and the soap opera General Hospital.