Hulk Hogan's son, Nick, made a heartfelt speech ahead of the wrestling legend's Real American Freestyle league's debut event ... saying his father put everything he had into the organization -- and he will make sure his vision is seen through.
RAF -- which launches Saturday night in Cleveland -- was one of the Hulkster's newest endeavors prior to his death last month ... and in a press conference leading up to the action, Nick said Terry Bollea truly loved the product they built.