Jake Paul just made good on his promise ... DESTROYING BEN ASKREN in a ferocious 1st round knockout!!!!
Askren -- a decorated MMA fighter -- threw some shots that landed in the opening moments of the fight.
But Jake Paul made it clear he was headhunting -- and connected with a DESTRUCTIVE right hand that sent the UFC fighter crashing to the floor.
Askren got up and wanted to continue -- but the ref waived it off, saying Askren was stumbling and too discombobulated to continue.