Marvin Vettori's badassery last week's already paying off ... 'cause Dana White tells TMZ Sports the UFC star could be tapped as the backup fighter for Israel Adesanya vs. Robert Whittaker's title fight.
Izzy, the champion, and Whittaker, the #1 contender, are fighting at UFC 271 in February ... and we asked White if 28-year-old Vettori would be selected as the fighter to step in should 1 of the men be unable to fight.
"It absolutely makes sense," Dana says.
FYI, Adesanya and Vettori fought in June at UFC 263.