He's even hooked up with famed MMA coach Greg Nelson -- who has trained UFC stars like Brock Lesnar.
It's an interesting move for White who's been making headlines for years -- both for his athletic talent and his fight with the NBA and Houston Rockets over the way they deal with mental health issues.
White's story is pretty well-known ... after dominating at Iowa State, he was selected 16th overall in the 2012 NBA Draft ... but didn't make his NBA debut until 2014 due to a dispute with the Houston Rockets over his mental health condition.
White was diagnosed with Generalized Anxiety Disorder in grade school -- he's openly talked about how the condition affects many facets of his life, especially flying.
Royce was drafted by the Rockets and immediately became openly outspoken for mental health awareness in the NBA, a stance he believes strained his relationship with league officials.
After a short stint with the Sacramento Kings, White picked up his basketball career in the National Basketball League of Canada, where he was league MVP in 2017.
But, if White is serious about getting a UFC contract, it seems he's leaving basketball for good ... with UFC honcho Dana White having talked about the insane commitment it takes to fight with the best in the world.
No word on if White has any amateur fights lined up at the moment -- but we're working the story and, hopefully, we'll know more soon.