UFC President Dana White said on a recent episode of ESPN's Dan Le Batard Show that WWE would not allow Brock Lesnar to fight again in the UFC while under contract with WWE.
During the interview (h/t Damon Martin of MMA Weekly), White said WWE had no interest in letting Lesnar compete for UFC again after previously allowing him to in 2016: "Lesnar was still under contract with WWE till next August.
Lesnar fought and defeated Mark Hunt at UFC 200 while still under contract with WWE, but it was later changed to a no contest when Lesnar tested positive for anti-estrogen agent hydroxy-clomiphene.
Despite that, rumors emerged regarding a potential bout between Lesnar and Jon "Bones" Jones after Jones and Lesnar called each other out publicly.
Another UFC fight may not be in the cards, and if it is, all signs point toward it occurring after Lesnar decides to end his WWE career.