Ravens LB Sergio Kindle may not be cleared to return to football next year.
The 23-year-old, who fractured his skull after falling down a flight of stairs in the summer, recently tweeted about his concerns of getting back on the field.
"Dr's up here make'n me nervous bout my chances of come'n back next yr!! dey aint say'n i wont play but dey aint say'n i am eitha!! KING SERG ..," he wrote in a tweet.
"yal know its a business so if i cant play next yr, dey aint gon keep me here!! But [expletive] IT i gota keep grind'n so i can ball out next yr!!"
Kindle had previously planned to return for offseason minicamps. He has been around the team throughout the season.
Baltimore can retain Kindle next season as an exclusive-rights free agent.