Requiem for a Heavyweight (1962)

"The world of Mountain Riviera... the fast buck... the angry men... the lonely woman!"

Mountain Rivera is a veteran heavyweight and near-champion who suddenly finds himself washed up in the only trade he knows—prizefighting. Yet, threatened by gangsters for welshing on a gambling debt, Mountain’s opportunistic manager, Maish Rennick, schemes to get the ex-boxer into a phony wrestling match to make some quick money. Although he and his loyal trainer, Army, oppose the degrading proposition, the disillusioned Mountain begins to wonder if he has any options left.