Student, University Minnesota, 1966.
His best known movie role is perhaps Ben Tuthill in the 1982 film Poltergeist. He has also appeared in the films Mother, Jugs & Speed (1976), Police Academy 4: Citizens on Patrol (1987), Funland (1987) and Action Jackson (1988). McManus was a series regular on the television sitcom Lewis & Clark as John, the bartender, the series lasted only season of thirteen episodes.
McManus also guest starred in several popular television series including M*A*South*H, Laverne & Shirley, Rhoda, The Six Million Dollar Manitoba, Dallas, Happy Days, Knight Rider, Mr.
Belvedere, Growing Pains, Newhart, Full House, Webster, The Golden Girls, Hunter and Columbo among others In 1989, he had a recurring role as Sid Wilson on the first season of Baywatch.
McManus" last known screen acting appearance was in a 2001 episode of According to Jim.
Served with United States Army, 1967-1971. Member Screen Actors Guild, American Federation of television and Radio Artists, Writers Guild American (Outstanding Script award 1980).
1 child, Molly Elizabeth.