Tom Brady was apparently all set to become a Raider after leaving the Patriots -- that is, until Jon Gruden stepped in and shot it down ... this according to Dana White.
The UFC honcho broke down the story Saturday during the UFC 278 broadcast ... telling Rob Gronkowski and a bunch of other panelists that TB12 was, in fact, gunning to join the Las Vegas Raiders ... something DW had been pitching him on for a long time at that point.
This was all happening during Tom's free agency period in 2020, BTW, and per Dana ... the GOAT was actually already scoping out houses in the area. So it sounds like it was just about a done deal -- with Dana working behind the scenes to make it all happen.
Not just that ... but Rob himself was apparently going to join Tom there in Vegas under this would-be move. The reason it fell apart, so says Dana, is because of the ex-head coach.
Gruden allegedly blew it up last minute, saying he didn't want Tom and co. -- and, apparently, the ownership listened to him. Tom ended up joining the Bucs instead, and went on to win the Super Bowl later in 2021 ... with none other than Gronk by his side for the glory.