AFC North injury updates

Here are some injury updates after the preseason openers:

BENGALS: The fear is that left guard Travelle Wharton, a free-agent addition from the Panthers, suffered a season-ending knee injury, according to the team's official website. Clint Boling, a fourth-round pick in 2011, is expected to replace Wharton. ... Defensive end Carlos Dunlap and middle linebacker Rey Maualuga both sprained their right knees. Maualuga said he'll only miss a couple of days, and Dunlap declined comment on a timetable to return.

BROWNS: Head coach Pat Shurmur said Mohamed Massaquoi suffered another concussion, which is why the wide receiver was pulled from the game after the first offensive snap. Massaquoi disputed that he had a concussion on Twitter. “No! Precautionary! Cant wait to get back to work!” Massaquoi wrote.

RAVENS: An MRI revealed no structural damage to tight end Ed Dickson's sprained right shoulder, a source told the Baltimore Sun. He is expected to return for the Monday night season opener against the Bengals. ... Backup defensive lineman Ryan McBean broke his ankle and will need surgery, a source told The Sun. McBean, a free-agent pickup from the Broncos, was already going to miss the first three games because of a league suspension.

STEELERS: Fullback-tight end David Johnson confirmed to the Pittsburgh Post-Gazette that he will undergo season-ending ACL surgery. The only other fullback on the roster is Will Johnson. ... Left tackle Mike Adams (knee) wouldn't say when he would return but indicated that it wouldn't be more than two weeks.