The Buffalo Bills' quarterback and the NFL confirmed that proper procedure was followed when Josh Allen re-entered the October 6 game after hitting his head.

Neuroscientist Chris Nowinski has said he wants the NFL to investigate the apparent head injury suffered by Buffalo Bills quarterback Josh Allen during Sunday’s defeat to the Houston Texans. Bills head coach Sean McDermott told reporters on Monday that Allen “was cleared and he went back in the game” after being examined by medical staff for concussion and chest and ankle injuries.

In the fourth quarter, Josh Allen tried to avoid the Texans pass rush and get a throw off before a would-be sack. While Allen did get the pass away, his head took the brunt of the force. Allen hit the side of his head hard against the turf and briefly appeared to lose consciousness.