UFC ring announcer Bruce Buffer is going to bat for his boy, Casper Smart -- asking Jennifer Lopez to give him a pass for blowing off a NY fundraiser to be Octagon-side at UFC 202.
As we previously reported, J Lo was pissed at Casper for not being by her side in the Hamptons at Ron Perelman's big party to raise money for a theater ... and dumped his ass because of it.
Well, Buffer says he totally gets why Smart would hold his ground -- UFC 202 was a HUUUUGE fight!!
Check out the clip ... Bruce lays out his best defense for Casper -- but at the end of the day, Mr. Smart ... ball's in your court.