The NFL is close to adopting a policy that would prohibit a player from re-entering a game that he exits with a concussion-related injury.
The policy will go into effect once the league and the NFLPA sign off on the document.
"We're really at a stage where we're dotting the i's and crossing the t's," Dr. Thom Mayer, the NFLPA's medical director, said on Saturday. "We're waiting on the final draft."
NFL Close To Rule On Return From Concussion