Jake Paul has a new opponent for July 20 -- Mike Tyson is out, and Mike Perry is in.
TMZ Sports has confirmed the Bare Knuckle FC star is stepping up to face off against El Gallo next month ... which was initially supposed to be the blockbuster fight with the boxing legend before it was postponed due to the recent ulcer flareup Tyson suffered on a flight.
We're told the bout will now take place at Amalie Arena in Tampa, Florida .