The father of the man O.J. Simpson killed is not sitting in the wings as Simpson tries to capitalize off his crimes ... because TMZ has learned Fred Goldman has already run to court to coral the cash.
Ron Goldman's dad just filed legal docs to divert any money Simpson makes from "interviews, shows, presentations or exhibitions" ... to satisfy the civil wrongful death judgment, which has now swelled to around $100 million.
TMZ broke the story ... Simpson is secretly autographing football helmets and he may have been selling photos since his release from prison last week.
Simpson has vowed not to pay Fred Goldman and has actually attacked him, insinuating he was a money grubber.