Patriots list Rob Gronkowski as week to week

The New England Patriots issued a statement on Tuesday regarding the condition of tight end Rob Gronkowski's right knee, saying his playing status is week to week after suffering a bone bruise/sprain during Sunday night's game in Denver.

Gronkowski was injured during the fourth quarter of the Patriots' 30-24 overtime loss to the Broncos.

"During Sunday night's game, Rob Gronkowski sustained a bone bruise/sprain of his right knee. His status will be evaluated on a week-to-week basis and listed accordingly on the practice participation and injury reports," the Patriots said in the statement. "There is no timetable for his readiness to return, which will be determined in the days or hours prior to the appropriate game. Any timetable reported prior to that final determination would be speculative."

In other moves, the Patriots signed wide receiver Damaris Johnson, claimed running back Trey Williams off waivers from the Dallas Cowboys, placed defensive lineman Trey Flowers on injured reserve and re-signed wide receiver Austin Hill to the practice squad.

.ESPN footage showed Gronkowski walking from the X-ray room to the Patriots' locker room with a slight limp, but on Monday, reports indicated that the injury was not serious and he could return to the field as early as Sunday night at Houston.

An MRI confirmed that Gronkowski has a bruised right knee but no tears, a source told ESPN on Monday.

Gronkowski was in the locker room walking around as reporters entered but did not answer questions after the Broncos handed the Patriots their first loss of the season.

Gronkowski cut through bad weather and the Denver defense to make six catches for 88 yards and a touchdown before being knocked out of the game.

The injury occurred with 2:49 remaining in the fourth quarter when Broncos defensive back Darian Stewart hit Gronkowski low on an incomplete pass. Gronkowski's leg whipped back as it made contact with Stewart.

Gronkowski has dealt with injuries in the past. He broke his forearm on Nov. 18, 2012, and tore his ACL on Dec. 8, 2013.

"He has been through a lot. He is a tough guy," Patriots quarterback Tom Brady said Monday.