In 1997, Giovinazzo moved to Los Angeles. Not long afterward, he successfully landed his first Hollywood role in the Buffy the Vampire Slayer pilot, in which his character was the show's first on-screen victim. Afterwards, he appeared in numerous guest-starring roles on television and in film, including Billy's Hollywood Screen Kiss, For Love of the Game, The Big Brass Ring, and Black Hawk Down. He was also cast as one of the stars of the short-lived UPN sitcom Shasta McNasty, which was nominated for a Peoples Choice Award. Other films in which he had starring roles include In Enemy Hands with william H. Macy, and Players with Freddy Rodriguez and Peter Dobson. He played Tony Galper, the victim in "Columbo Likes the Nightlife", the final episode of the TV series Columbo.