Conor McGregor's return to UFC ended much sooner than anyone expected. After five years away from the octagon, the Irishman suffered a serious right knee injury during the opening moments of his fight against Max Holloway in UFC 329 and was unable to continue.
The fight officially ended at 1:09 of the first round. McGregor attempted a jump roundhouse kick, landed unsteadily on his forward leg, and his knee gave way. Although he tried to keep fighting, he could barely put on the weight or move around normally. The referee ended up stopping the fight and Holloway was declared the winner by TKO due to injury.
What Injury Does Conor McGregor Have Exactly?
For now, what is confirmed is that McGregor suffered a significant internal injury to his right knee and that he will have to undergo surgery. The fighter himself has explained that he is still waiting to know all the details of the medical tests, so a complete diagnosis has not yet been made public that specifies which ligaments or structures are damaged.
The first suspicions immediately pointed to a serious injury to the anterior cruciate ligament, but that possibility should not be confirmed until there is a definitive medical report. The meniscus, other ligaments of the knee or several structures could also be affected at the same time.
What does seem clear is that it is not a simple sprain. McGregor has already announced that he will need surgery and that he is preparing a new recovery process. That data places the problem in a much more serious scenario and reduces the chances of seeing him compete again during 2026 to practically zero.
The Irishman has also denied that he arrived injured to the fight. After speculation caused by the images prior to his entry into the octagon, he assured that he had completed the camp without problems, that he was in top shape and that the gesture observed while taking off his shoes was only due to a momentary loss of balance.
The injury, therefore, would have appeared when landing after the kick and not as a result of a previous known problem.
A knee that is especially important for your style
The injury affects the right leg, which in McGregor's left guard functions as an advanced leg. This is of enormous importance because it is the limb on which he carries a good part of the weight to move, enter and leave the distance, throw the left and react to the opponent's attacks.
McGregor himself has compared the situation to the cruciate ligament injury he suffered in his first fight against Holloway in 2013. On that occasion he was able to complete the fight because the damage was to his back leg and the fight spent long periods on the ground. This time, as the forward leg was affected, any movement was practically impossible.
There is also an important difference with the fracture suffered against Dustin Poirier in 2021. That injury affected the tibia and fibula of his left leg. The new injury is in the right knee, so it cannot be directly attributed to the old fracture.
Still, McGregor's physical history is starting to be a factor that is hard to ignore. In recent years he has suffered a serious broken leg, a toe injury that delayed his previous comeback and now a new problem that requires surgery.
How long will you be out?
Without a complete medical diagnosis, it is not possible to establish an exact timeframe. The recovery time will depend on which structure is damaged and the type of operation you need.
A severe ACL injury usually takes nine to twelve months before an elite athlete can safely return to competition. If there is additional damage to the meniscus or other ligaments, recovery could be lengthened. In less severe scenarios, the return could occur sooner, but the need for surgery makes it difficult to think about a quick recovery.
In McGregor's case, moreover, it will not be enough to receive medical clearance. He will have to regain leg strength, joint stability, confidence to throw kicks and several months of specific training before completing a MMA camp.
At 38 years of age and after such a prolonged inactivity, the process will have to be managed with special prudence. A hasty return would increase the risk of relapse and could definitively compromise his sporting future.
Will Conor McGregor fight again?
McGregor maintains that his intention is to recover and return to the octagon. He has not spoken of retirement and has already pointed to Max Holloway as the opponent he wants for his return.
The Irishman believes that the history between the two needs a third fight. McGregor won the first meeting in 2013 and Holloway took the rematch due to injury in UFC 329. A trilogy would allow the rivalry to close with a full fight, although right now there are too many unknowns to take it for granted.
The main obstacle is time. Holloway came out of the fight largely intact and it doesn't seem reasonable for him to remain inactive for a year waiting for McGregor's recovery. His career will continue and his sporting situation could be very different when the Irishman is ready to return.
The UFC itself has also lowered expectations. Although it understands the commercial interest of a third fight, the company considers it premature to talk about opponents before knowing the extent of the injury, the evolution of rehabilitation and the condition of both fighters in 2027.
There is also an important contractual detail. McGregor would have one last fight left in his current contract with the UFC. That makes his possible return an especially relevant fight, because it could be his farewell to the company or the beginning of a new negotiation.
Does it make sense to come back after another injury?
The final decision will not only be medical. McGregor will have to assess whether he is willing to face another long rehabilitation after everything that has happened since 2021.
His financial situation does not force him to compete and his legacy is already built. He was the first simultaneous two-division champion in UFC history and starred in some of the biggest events in the sport. However, his last full bout dates back several years and his two most recent comebacks ended marked by injuries.
From a sporting point of view, a lap in 2027 would raise numerous questions. Age, lack of activity, knee response and difficulty in regaining competitive rhythm would be huge obstacles. He would also have to accept that he would probably no longer return to start a race to the belt, but to fight one last big fight.
That's where the trilogy with Holloway makes sense. It wouldn't need a title or a specific position in the rankings. It has history, commercial interest and a clear sporting explanation after the frustrating outcome of UFC 329.
But before talking about opponents, McGregor faces a much less attractive and probably tougher fight: surgery, rehabilitation and months of uncertainty.
The Irishman assures that he will return. The reality is that no one can yet know if his knee, his age and his body will allow him to do so at the level that the UFC demands. The first answer will come when the definitive diagnosis is known. The rest will depend on how he responds during a recovery that could extend well into 2027.