C onor McGregor has officially returned to the UFC's drug testing pool. Joining the pool is step one for McGregor's potential comeback, possibly at next year's proposed White House card.

Four years after his exit from the sport of MMA, Conor McGregor is teasing a comeback to the UFC. This time, however, the stage is big enough to overshadow any doubts about his claims.

Conor McGregor has issued a major update on his UFC career as his highly-anticipated return is officially in motion. McGregor has been extremely inactive, having not fought since his crushing first-round TKO defeat to Dustin Poirier at UFC 264 back in July 2021.

Conor McGregor has given his first drugs test sample – a sure sign he is stepping up UFC comeback plans. McGregor hasn’t fought since breaking his leg against Dustin Poirier in 2021

Conor McGregor is officially back and undergoing drug tests ahead of a potential comeback. According to the official UFC Anti-Doping website, as of Aug. 1, McGregor has registered his first test session of 2025.

Conor McGregor, a former UFC two-division champion, logged his first UFC drug test of 2025, a key step toward returning to the octagon. The test, recorded on the UFC Anti-Doping website, marks his re-entry into the testing pool after exiting earlier this year.