It never happened in the UFC ... but Ronda Rousey vs. Cris Cyborg MIGHT go down in the WWE -- with Mick Foley telling TMZ Sports he's been lobbying Vince McMahon to sign the Brazilian star.
"I had a meeting with Mr. McMahon and I specifically told him keep your eyes on this Cyborg vs. Nunes fight," Mick said.
"She's gonna be larger than life and would make a great WWE superstar down the line."
The Cyborg vs.