Sbarge made his stage debut in Joseph Papp's 1981 Shakespeare in the Park production of Henry IV, Part 1. The following year he made his Broadway debut opposite Faye Dunaway in the short-lived play The Curse of an Aching Heart. Additional theatre New York credits include Hamlet (1982), Ah, Wilderness! (1988), Ghosts (1988), The Twilight of the Golds (1993), The Shadow Box, and Voices in the Dark (1999).
Sbarge has appeared in numerous television series and television movies, including A Streetcar Named Desire with Ann-Margret in 1984; Billionaire Boys Club, Cracked Up with Edward Asner, and Prison for Children in 1987; Back to Hannibal: The Return of Tom Sawyer and Huckleberry Finn in 1990; Murder 101 with Pierce Brosnan and Final Verdict with Treat Williams in 1991; Breast Men with Chris Cooper and Quicksilver Highway with Christopher Lloyd in 1997; and Introducing Dorothy Dandridge with Halle Berry in 1999. He had recurring roles in five episodes of Star Trek: Voyager in 1996, and in the first four episodes of the sixth season of 24. He also has voice acted for video games such as Star Wars: Knights of the Old Republic, Star Wars: Knights of the Old Republic II: The Sith Lords as Carth Onasi, as RC-1262 "Scorch" in Star Wars: Republic Commando, and as Kaidan Alenko in Mass Effect. Additionally, Sbarge also voiced the character Professor Zei in a guest star appearance on the thirtieth episode of the Nickelodeon TV show Avatar: The Last Airbender. Sbarge is married to actress Lisa Akey; they live in Los Angeles with her daughter Grace.