Sean got hurt in the back of the knee and actually I saw a video about his injury which might be true and you should check it too
https://www.youtube.com/watch?v=A5tdgQAZuVYBasically he lost the feeling on the leg after getting hit on some nerve and hence twisted his feet after that.
What I do not like was how Marlon Vera was shouting like he knocked out Sean with a single punch and kept on saying idiotic things in the interview after that. I mean yes you win, but clearly because of the injury and have some calmness if not respect for the opponent.
Eye pokes again in the Miocic vs Cormier fight so I don't know what to say about that fight since Miocic has done it only this time while Cormier gets to feel how it hurts when he used to do it against Miocic in previous fights.
JDS was looking good but Rozen's power was too much.
Even though the peroneal nerve is just a speculation I really get to think after watching the video you have shown Marlon Vera might have plan for it or even though it is just a coincidence we can conclude that Sean O'Malley did really lose, because he doesn't recover fast from losing his sensation on his peroneal nerve that is why he got injured in the process, Well Marlon Vera is a jerk in doing so clearly if this is intentional then he is really afraid that he might lose to Sean O'Malley for being a great fighter than him.
This is the second time he is having the same injury during a fight and i think the body of Sean O'Malley is brittle and could get injured easily and in this fight Marlon Vera was smart enough to take advantage of the situation and finish the fight while his other opponent Andre Soukhamthath failed to take advantage of the injury.
The calf kick is effective against some fighters and i have seen the same injury for Michael Chandler during the fight and he is usually a durable fighter but the kick on the calf by Primus had the same affect like we saw with Sean O' Malley and for any fight fans of Michael Chandler we might see him in the UFC as he is a free agent and he is meeting with Dana White and i hope to see him in the UFC.
Anthony Johnson is returning and the announced that he will be going to the light heavyweight division because Jones said he is vacating the belt and DC retired.
Anthony Johnson is planning to return for over a year and early he was said to be coming back as a heavyweight fighter and he is massive and how can he reduce that kind of muscle to get back to light heavyweight.
Clearly that kick of the back of the knee is pretty effective on Sean O'Malley in getting those weird wobbly feet, This might be a technique that Marlon Vera is anticipating and after seeing that O'Malley is now getting outbalance he had take that opportunity to strike, Base on fullhdpixel's Analysis with his provided video this had happen on the fight of Johnson VS Cejudo when Johnson kicked the back of Cejudo's knee the same sensation like O'Malley, I don't know if Vera anticipated that same thing might happen to O'Malley or just a coincidence but Sean O'Malley had got injured because of that Peroneal Nerve thing.