Tennessee Titans tight end Delanie Walker suffered an ankle injury during Sunday's season opener against the Miami Dolphins.
According to reporter Paul Kuharsky, Walker was carted off after his ankle "looked to bend at an awkward angle."
Ian Rapoport of NFL.com added more context:
Ian Rapoport#Titans TE Delanie Walker just suffered a leg injury and the cart came out immediately. His right leg was put in an air cast, often indicating a fracture.
The 34-year-old has been one of the NFL's most consistent and productive tight ends since joining the Titans in 2013 after seven seasons with the San Francisco 49ers.