IT'S OFFICIAL -- Jake Paul's next boxing opponent is ex-UFC welterweight champion Tyron Woodley!!
Both sides have signed contracts to clash on August 28 on Showtime -- and Jake is already talking all sorts of trash!
"I have a list of people I plan on knocking out and as I enter my fourth pro fight," Paul said ... "I am excited to cross the first one off the list by challenging myself against Tyron Woodley, a 5 time UFC Champion known for his knockout power."
24-year-old is 3-0 as a pro, with victories over Nate Robinson and UFC fighter Ben Askren.