On December 24, 1953, Evers married Actress Shirley Ballard; they divorced in September 1966. In 1974, he married Diana James, and they divorced in May 1975. Lucille Maross was "his final partner".
A stint on Broadway led to Hollywood, where his first recurring role was on the 1960 NBC western television series, Wrangler. On June 30, 1960, Evers appeared on NBC's The Ford Show, Starring Tennessee Ernie Ford. He was cast for an episode of the ABC western series, The Rebel ("Miz Purdy", 1961) appearing as George Tess.
Evers made three guest appearances on Perry Mason, including the role of murder victim Stuart Benton in "The Case of the Difficult Detour" (1961), and defendant Roy Galen in "The Case of the Latent Lover" (1964). In "The Case of the Posthumous Painter" (also 1961), he played the defendant's brother.
In the 1963–1964 season, Evers starred as 41-year-old Professor Jason Howe in the 26-episode ABC drama series, Channing, based on life on a college campus. His most enduring role derived from the 1959 B-movie classic The Brain That Wouldn't Die, which was not released until 1962.
Evers continued to appear in films and television, in such series as "The Rockford Files", having guest starred with Bruce Lee in the Green Hornet episode "Eat, Drink and be Dead" (1966), but they were of an increasingly minor nature. Evers also appeared as a race car driver and a romantic interest of Doris Martin in The Doris Day Show in 1970. His later films included A Piece of the Action (1977), Claws (1977) and Barracuda (1978), and his final film appearance was in 1990 in Basket Case 2. He returned to New York in his later years.
Evers featured in an episode of the original Star Trek (Wink of an Eye, 1968) about a race of aliens who exist in a hyperaccelerated time frame and briefly take over the starship. The same year he appeared in the films The Green Berets, P.J. and A Man Called Gannon, and also appeared in sci-fi films such as The Illustrated Man (1969) and Escape from the Planet of the Apes (1971).
Evers died of heart failure in Los Angeles on March 13, 2005.