If what Manny Pacquiao recently said was true and his camp did reach out to McGregor's camp about a fight, the UFC's lawyers could argue that constitutes Tortious interference with McGregor's UFC contract.
And the UFC boss even joked that if the 38-year-old was talking to his fighter then he was ready to sue him.
Pacquiao is undoubtedly searching for a multimillion dollar fight with McGregor similar to the deal Floyd Mayweather had when he fought the UFC star in August.
We imagine White's threat carries clearly to all the other would-be opponents of Conor McGregor now not on the UFC roster: don't even float the idea of a fight with McGregor or things will get litigious fast. On Thanksgiving, Pacquaio posted a photo of the 29-year-old MMA fighter on Instagram.
Asked if he had already approached McGregor's handlers for such a fight, Pacquiao told AFP, "initially, but we have not yet had any follow-up conversations". Stay fit my friend.
UFC president Dana White sounds like he's had enough of boxers trying to poach Conor McGregor from the UFC for another superfight.
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McGregor went on to lose the bout as referee Robert Byrd stopped the fight in the 10th round.
Pacquiao (59-7-2) hasn't fought since July when he lost his WBO welterweight title by decision against upstart Jeff Horn in Australia.
Like McGregor, Pacquiao, who has won eight world championships in different weight divisions, also lost to Mayweather in a disappointing "fight of the century" in Las Vegas in 2015.
He stressed that McGregor is just one of many possible opponents when he returns to the ring for the first time since his defeat to Horn.
"It depends who they can finalize as my opponent by April", Pacquiao said.