The National Football Post reports that WR Justin Gage is playing with broken bones In back:

Tennessee Titans wide receiver suffered multiple broken transverse bones in his lower back and is regarded as extremely unlikely to play Sunday against the Buffalo Bills. Gage landed awkwardly after executing a leaping reception during a win last week over the San Francisco 49ers. Titans coach Jeff Fisher indicated that X-rays and MRIs revealed that there were several fractures, but the breaks don’t affect any crucial spine areas and Gage has said he has full mobility and feeling.