Watch: Tannehill appeared to plant left leg before falling in pain
Jasen Vinlove-USA TODAY Sports
Video from Miami Dolphins training camp appears to show the moment quarterback Ryan Tannehill injured his left knee Thursday.
On a scramble, Tannehill planted his left leg before falling to the ground in pain. He was wearing a brace on the leg as the result of a December 2016 injury to his MCL and ACL - an injury from which Tannehill recently said he had fully recovered.
The Dolphins haven't provided an update on Tannehill's injury but are reportedly fearing the worst.