Answer
Burt Young co-starred with Sam Peckinpah in The Killer Elite. The film is a 1975 action film directed by Peckinpah and starring Robert Mitchum, James Garner, and Richard Roundtree. Young plays the role of Peter Thornton, a Vietnam War veteran who is hired by Mitchum's character to kill Garner's character. The film was a commercial failure, but it has since become a cult classic.