Patriots defensive coordinator Terrell Williams was back at practice on Tuesday after he left early the day prior and was treated for dehydration.

A scary moment played out for Patriots defensive coordinator Terrell Williams during Monday's practice, as the 51-year-old was forced to leave the session early and had to be treated for dehydration.

Williams left the practice field for further evaluation with inside linebackers coach Zak Kuhr taking over as defensive playcaller in practice. After practice, the Patriots announced that Williams was being treated for dehydration and he was going to be ok.