I can't tell if he had it at during the 5th round or after the fight was over. Joe Rogan even noticed it.
Someone said in an interview that he was sparring with Ben Henderson and then after they were done Ben flipped the toothpick out of his mouth. He said he had no idea that the whole time they were sparring Ben had a toothpick in his mouth the whole time.
He has mad talent with toothpicks.