• Conor McGregor complained about incurring an injured leg after getting knocked out by Dustin Poirier
  • Physician Brian Sutterer discusses how McGregor's "dead" leg could have led to his defeat
  • Sutterer reveals why UFC fighters have been targeting the said part of the leg during fights

Conor McGregor’s excuse for his UFC 257 KO loss to Dustin Poirier could be valid after all.

The mixed martial arts world was stunned after Poirier stopped McGregor in the second round of their highly-anticipated rematch at UFC 257 on Saturday.

In his post-fight interview, McGregor explained, “my leg is completely dead, and even though I felt like I was checking them [Poirier’s leg kicks] it was just sinking into the muscle at the front of my leg.”

Though the former two-division champ’s statement came across as an excuse for many, Brian Sutterer MD decided to release a video detailing exactly what kind of punishment the Irishman had sustained in the said leg which could possibly led to him getting knocked out.

According to Sutterer, McGregor was already “in some serious” pain moments before Poirier unloaded a barrage of punches.

In the video, the physician pointed out that Poirier’s precise leg kicks quickly damaged the Irish fighter’s “lower leg" which was already “dead” by the time “The Diamond” put in some work on him in the final moments of the fight.

Sutterer also suggested that it was extremely difficult for someone to add weight on the said leg while in a middle of a fight.

"As soon as he put weight on that right leg, he was in some serious discomfort," Sutterer explained. "[Poirier's leg kicks] made contact exactly on this kind of lateral aspect of McGregor's lower leg near the outside of the calf. Even right away we can see McGregor have some pain here, having difficulty putting weight on that leg. And that just accumulated throughout the fight, so at the end, McGregor's leg was basically dead.”

"A kick in this area is specifically targeting something we call the common fibular nerve,” he added. “It's the nerve that supplies muscle control to part of the lower leg, but also some of the sensation.”

Apparently, Poirier didn’t just get lucky, as per Sutterer, UFC fighters have been doing it for quite some time.

"Pay attention to exactly where Poirier's leg is making contact with McGregor's, it's just below his knee,” the doctor examined. "This is where these UFC fighters are trying to strike to have these effective calf kicks. The green nerve [in the video] is that common fibular nerve, and what's important about it is how superficial it is, meaning how close it is to the skin.”

"A lot of other big nerves in our body are deep beneath skin or deep beneath muscle, and so they're pretty well protected,” he continued. “But this nerve, in particular, is really close to the surface and really susceptible to these stuns and getting injured."

McGregor vs. Poirier
In this handout image provided by the UFC, Dustin Poirier reacts after his knockout victory over Conor McGregor of Ireland in a lightweight fight during the UFC 257 event inside Etihad Arena on UFC Fight Island Getty Images | Jeff Bottari/Zuffa LLC