The film version is somewhat darker in its plotline than the original teleplay.
Plot
Luis "Mountain" Rivera is an aging heavyweight boxer. He is managed by Maish Rennick, and Army serves as his cutman. After his latest bout, against young up-and-comer Cassius Clay, Mountain take a serious beating and the doctor refuses to certify Mountain for future fights. Afterward, Maish is confronted by Ma Greeny and her thugs. They threaten Maish's life if he fails to repay them for the losses they incurred after betting that Mountain would go down in a certain round of the match - a fix that Maish had guaranteed. Maish's deal with them had been that they should deduct from their winnings the vast sums of money that Maish's betting losses had run up with them.
Meanwhile, Mountain struggles to find a job and visits an employment agency, where he meets Grace Miller. Grace is initially standoffish but quickly becomes sympathetic to Mountain, and says she'll be in touch. Later, Grace meets with Mountain to tell him of an opening for a counselor position at a children's camp, which interests Mountain. The two bond over a drink and Mountain shares stories of his time in the ring.
Mountain returns to his apartment - shared with Maish and Army - where Maish proposes the three get into professional wrestling. Mountain is reluctant, not liking the staged nature of wrestling. Maish, hoping that Mountain will forget about the job interview, takes him to a bar, where they both get drunk. Army arrives at the bar to remind Mountain about the appointment. However, Rivera embarrasses himself at the hotel where the interview is to take place by behaving drunkenly in plain sight of the camp owners. After this episode, Grace confronts Maish in tears, condemning him for controlling Mountain and ruining his chance to make a new life for himself. Maish responds forcefully and eloquently to Grace's accusation that he has been over-controlling of Mountain, disputing the notion that he cares nothing for the boxer, his best interests, and his future. He tells Grace that she must stop daydreaming and recognize that her idealized conception of Luis Rivera is as false and damaging to the fighter as is Maish's alleged mediocre management of the boxer's career. Further, he tells her that her so-called "vision" for Rivera's post-boxing future as a counselor at a children's summer camp is as naïve and pathetic as it is improbable.
To pay off Maish's gambling debts, Mountain agrees to perform as Native American wrestling persona "Big Chief Mountain Rivera." Just prior to entering the ring for his first match, an overwhelming tide of humiliation sweeps over Mountain, causing him to change his mind. Maish blurts out that he bet against Mountain in the fight against Clay, and as Rivera attempts to leave the locker room, Ma Greeny and her thugs enter, threatening Maish. This causes Mountain to change his mind and agree to wrestle, thereby allowing Ma to be paid and saving Maish's life.
In the final scene of the film, Mountain enters the ring amidst jeering ridicule to face Haystack Calhoun, a wrestler from Arkansas billed at 601 pounds (273 kg).
The film was met with positive reviews upon its release. Rotten Tomatoes gives it a rating of 89% from a sample of 46 critics with the consensus: "Requiem for a Heavyweight is a stirring character study of a battered boxer that may at times pummel its message yet retains cinematic métier and human nobility."[3]
