The Break Changes a Fighter: Is Conor McGregor’s Career Nearing Its End After UFC 329?
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UFC fighters in this four-fighter sample saw their combined win rate fall from 81.8% before catastrophic lower-leg fractures to 28.6% after returning to competition.
Estimated reading time: 10 minutes
Key Takeaways
- Conor McGregor recently faced another devastating leg injury during UFC 329, raising questions about his future in the sport.
- UFC history shows that many fighters struggle to regain their former level after leg fractures, including Anderson Silva and Chris Weidman.
- The statistics for UFC fighters after leg fractures reveal a significant decline in their performance, with many winning less than 30% of their fights post-injury.
- McGregor’s age and inactivity may complicate his recovery, making a return to elite competition more challenging than before.
- While retirement isn’t guaranteed, McGregor’s injuries make it a realistic possibility, reflecting a troubling trend among UFC fighters after leg fractures.
Table of contents
UFC history shows that fighters can return from devastating leg injuries, but returning is not the same as becoming the fighter they once were.
Conor McGregor’s return was supposed to answer five years of questions.
Could the former two-division UFC champion still compete with an elite opponent? Had the years away allowed his body to recover, or had inactivity taken away the timing and sharpness that once made him one of the most dangerous fighters in mixed martial arts? Was this the beginning of one final championship run, or simply the closing chapter of a historic career?
Instead, UFC 329 gave us another question.
Have we seen Conor McGregor compete inside the UFC Octagon for the final time?
McGregor’s highly anticipated rematch with Max Holloway ended just 69 seconds into the opening round. After attempting a jumping kick, McGregor landed awkwardly and his right leg buckled beneath him. Holloway recognized that something was wrong, the fight was stopped, and McGregor was handed a first-round technical-knockout loss because of a knee injury. The exact diagnosis has not been publicly confirmed, although UFC CEO Dana White said doctors initially suspected a torn ACL.
It is important to be precise: this has not been confirmed as McGregor’s second broken leg.
It is, however, his second catastrophic leg injury suffered during a UFC fight—and it occurred in his first appearance since the first one nearly ended his career.
That history makes the latest setback more concerning than an ordinary injury.
The first break changed everything
On July 10, 2021, McGregor faced Dustin Poirier for the third time in the main event of UFC 264.
Near the end of the opening round, McGregor stepped backward and suffered fractures to his left tibia and fibula. He fell against the cage, and the fight was stopped between rounds. Poirier was awarded the technical-knockout victory.
It was a brutal ending to a difficult period of McGregor’s career. The Irish star had already lost three of his previous six MMA fights entering UFC 264, including a knockout loss to Poirier less than six months earlier.
The broken leg then removed McGregor from active competition for five years.
He did not return as the same athlete who had stopped José Aldo in 13 seconds, dismantled Eddie Alvarez to become a simultaneous two-division champion or defeated Holloway during their first meeting in 2013.
No fighter would.
Athletes can recover structurally from a fracture. Surgeons can stabilize the bone. Rehabilitation can rebuild strength. Training can restore movement.
What cannot be recreated is the time that was lost.
Five years passed. McGregor grew older. The division continued moving. Holloway remained active against elite competition while McGregor’s comeback was repeatedly delayed, including the cancellation of a planned 2024 fight against Michael Chandler because of a broken toe.
Then, only 69 seconds into his return, McGregor’s other leg failed him.
UFC history offers a troubling pattern
McGregor is not the first UFC fighter to attempt a comeback after suffering a catastrophic lower-leg fracture.
Corey Hill, Anderson Silva and Chris Weidman all fractured their tibia and fibula during UFC competition. Each eventually returned to professional MMA. Each demonstrated remarkable physical and mental toughness simply by competing again.
None consistently regained his previous level of success.
Looking at those three fighters alongside McGregor, the four entered their fracture bouts with a combined professional record of 72 wins and 16 losses. That equals an 81.8% combined winning percentage before the fractures occurred.
After returning, those fighters produced a combined record of:
6 wins, 15 losses and one no contest
When the no contest is removed, their post-fracture winning percentage falls to 28.6%.
Inside the UFC specifically, their combined record after returning is 2–8 with one no contest—a winning percentage of just 20% when the no contest is excluded.
That is a decline of more than 53 percentage points between their combined records before the fractures and their performances afterward.
The sample is small, and it would be irresponsible to claim that the fractures alone caused every subsequent loss. Fighters suffering these injuries are frequently older athletes with considerable mileage already accumulated. Age, inactivity, opponent quality, declining reaction time and previous damage all contribute.
Still, the pattern cannot simply be ignored. Returning from the injury is possible. Returning as the same fighter is much less common.
Corey Hill, Anderson Silva, Chris Weidman and Conor McGregor had a combined 81.8% win rate before suffering tibia-and-fibula fractures. After returning, that number dropped to just 28.6%—and only 20% in UFC competition.
The sample is small, but the pattern is difficult to ignore: returning is possible, but returning as the same fighter is rare.
Do you think McGregor can still produce one final meaningful comeback?
Anderson Silva returned, but the dominance did not
Anderson Silva suffered perhaps the most famous broken leg in UFC history during his 2013 rematch with Chris Weidman.
Silva entered that fight with a professional record of 33–5. He had already established himself as one of the greatest fighters the sport had ever seen, holding the UFC middleweight championship for nearly seven years and producing one of the promotion’s longest periods of dominance.
He returned approximately 13 months after the injury.
In seven subsequent UFC appearances, Silva recorded one victory, five losses and one no contest. His only official post-injury win came against Derek Brunson in 2017.
Silva remained skilled. He could still show flashes of the creativity, timing and defensive awareness that once separated him from nearly every other fighter. The consistency was gone.
That does not mean the broken leg single-handedly ended Silva’s reign. He was already 38 years old when the injury occurred, and he had lost the championship to Weidman in their previous fight. But the injury became a clear dividing line.
There was Anderson Silva before the break and Anderson Silva after it. They were not the same competitor.
Chris Weidman fought his way back
Weidman experienced the other side of the same horrifying sequence in April 2021.
More than seven years after checking the kick that broke Silva’s leg, Weidman threw a low kick against Uriah Hall at UFC 261. Hall checked it, and Weidman fractured his right tibia and fibula just 17 seconds into the fight.
His recovery required multiple surgeries and more than two years away from competition.
Weidman returned against Brad Tavares in August 2023 and lost by unanimous decision. He later defeated Bruno Silva by technical decision before suffering a technical-knockout loss to Eryk Anders.
His post-injury record finished at 1–2 before he announced his retirement from the UFC in January 2025.
Weidman’s return should not be viewed as a failure. Returning after that injury was an accomplishment few people could fully understand.
But courage and competitiveness do not stop time.
Corey Hill found success, but not consistently
Corey Hill suffered a right tibia-and-fibula fracture against Dale Hartt in December 2008.
Hill returned approximately 13 months later and won his first fight back. He continued competing regionally and finished his post-injury career with four wins and seven losses.
His 36.4% post-injury winning percentage is the highest among the four fighters in this comparison, yet it remained well below the success rate he had established before the fracture. Hill never competed in the UFC again.
Again, the lesson is not that recovery is impossible.
The lesson is that successful recovery should not automatically be confused with a complete competitive restoration.
McGregor now faces a different fight
McGregor’s circumstances may be even more difficult.
He is 37 years old. He has fought only four times in MMA since winning the lightweight championship in November 2016, losing three of those four appearances before his UFC 329 injury. His latest fight lasted barely more than a minute, meaning there was not enough time to determine how his skills compared with Holloway’s after the five-year absence.
We saw movement. We saw ambition. We saw McGregor immediately attempting an explosive technique.
We did not see enough sustained competition to determine whether the old timing, distance management or counterstriking remained. Now, he must begin another surgical recovery.
McGregor has indicated that he plans to undergo surgery and still wants to complete the final fight remaining on his current UFC contract. That determination is consistent with the mentality required to become the first simultaneous two-division champion in UFC history.
But determination does not erase the reality of the situation.
Another recovery could take many months. If the injury is confirmed as a complete ACL tear, rehabilitation could potentially keep him out for a year or longer. By the time McGregor is physically prepared to return, he may be approaching 39 years old after competing for little more than one minute across a six-year period.
At that point, the UFC must also ask whether placing him in another major main event is responsible—from both a competitive and business standpoint.
McGregor remains one of the largest attractions in combat-sports history. His name still creates attention, discussion and revenue.
But the UFC cannot promote memories as though they are current athletic evidence.
We should prepare for the possibility that this is the end
Nobody outside McGregor’s medical team currently knows the full severity of the injury. Declaring his career finished before a confirmed diagnosis would be premature. Ignoring the historical evidence would be equally irresponsible.
The UFC fighters in this comparison won fewer than three out of every 10 professional MMA fights after returning from catastrophic lower-leg fractures. Inside the UFC, they won only two of 10 completed decisions or finishes.
McGregor has now suffered two major in-cage leg injuries, five years apart, without completing a full round between them. That does not guarantee retirement. It makes retirement a realistic possibility.
Perhaps McGregor rehabilitates the knee, returns for the final fight on his contract and chooses to leave the sport under his own terms. Perhaps the opponent is Michael Chandler in a long-delayed matchup built around entertainment rather than championship relevance. Perhaps the UFC grants him one final walk to the Octagon in Ireland, Las Vegas or another destination worthy of his drawing power.
There is still hope because fighters have returned from injuries that once appeared impossible to overcome.
Hill came back and won. Silva returned to compete seven more times in the UFC. Weidman endured multiple operations before earning another victory. McGregor himself spent five years rebuilding his fractured leg and still found the confidence to open his return with an explosive jumping kick. The competitive numbers are unforgiving, but they are not destiny.
McGregor may never again be the fighter who held two UFC championships, silenced Madison Square Garden or changed how combat-sports athletes promoted themselves.
He does not need to become that fighter again to produce one final meaningful moment. Sometimes the final victory is not another championship. Sometimes it is recovering, making the walk one more time and leaving the cage on your feet.
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