Gray got in a UTV accident over the weekend and had to enter the NFL's concussion protocol, Turron Davenport of ESPN.com reports.
Davenport further clarified that, "It was not a case of reckless driving and no alcohol was involved." A statement from the team said Gray should be able to return once he's out of the protocol. The linebacker finished fourth in the NFL last season with 164 tackles (97 solo).