The club said DeMarco sprained his right shoulder when he flipped while riding on his property in Arizona.
Stability is a longer-term disability.
This isn't as serious, and there should be no problem healing. He'll certainly be fine for the regular season and should be able to play in a lot of the exhibition games. The injury prevents the Bengals from working their starting offensive line together from the time training camp opens July 30. DeMarco, a free-agent pickup from Jacksonville, joins left guard Matt O'Dwyer, a free agent from the New York Jets, and converted guard Rich Braham at center to give Cincinnati a new interior. The club is also concerned O'Dwyer's situation could leave the Bengals where they started free agency, with untried Rod Payne and Mike Goff at center and right guard, respectively.