Barnaby Jones (1973)

S02E24 Foul Play

The owner of a basketball team learns that his star athlete was involved in throwing a game. The informant, with ulterior motives, wants the owner to ensure that his team loses again. In a fit of rage, the owner kills the informant. The man's wife, who happens to be the sister of the player, hires Barnaby to track down her missing husband and uncover the truth behind his disappearance.