If Vin Diesel and The Rock came to blows, Vin is adamant he'd whoop Rock's candy a** all the way back to the WWE ... and he's serious.
Just ask UFC champ Tyron Woodley -- who says he was confronted by Vin (in a non-violent way) at the "Guardians of the Galaxy Vol. 2" premiere because Tyron publicly picked Rock to win in a hypothetical cage match. Find more at TMZ.com