As Conor McGregor approaches his highly anticipated return fight next month five years after fracturing his tibia and fibula, his recovery is being called into question.

A New York Times investigation claims anti-doping officials learned Conor McGregor allegedly used banned substances during his recovery from a severe leg injury. The report also alleges efforts to avoid anti-doping scrutiny.

The former UFC double champion reportedly had the support of notable surgeon Neal ElAttrache, who performed the surgery to repair McGregor's leg.

Conor McGregor’s return to the UFC is officially on the schedule, five years after a broken leg cut short his last fight against Dustin Poirier. The Irishman will step back into the Octagon for a rematch with Max Holloway,

Eddie Alvarez knows how dangerous it is to underestimate Conor McGregor, but even so, he’s skeptical about how “Notorious” will look in his return. This summer, McGregor makes his return to the octagon after a five-year layoff,