Odell Beckham Jr. got on the phone and delivered a hell of a pump-up speech to Canelo Alvarez before his fight against Gennady "GGG" Golovkin ... telling the star boxer to straight up "kick his ass!"
The convo happened via Facetime on Friday -- the day before the Canelo-GGG trilogy fight will go down -- and OBJ was super hyped to hop on the horn with the fighter.
The NFL star told Canelo he's actually the reason he in fell in love with boxing.
"Big fan of you!" OBJ said on the phone.