Bucs' Vincent Jackson unable to practice because of knee injury

TAMPA, Fla. -- Wide receiver Vincent Jackson missed practice Wednesday with a knee injury, but Tampa Bay Buccaneers coach Lovie Smith didn't provide a timetable for how long Jackson might be out.

"We're not there," Smith said. "He didn't practice today. He has a knee injury. As far as multiple [weeks], we're not ready to go into much [more] detail than that, because we don't know a lot more."

Jackson had one catch for 13 yards in a loss to the Washington Redskins last Sunday before leaving with the injury. The three-time Pro Bowl receiver has 21 catches for 319 yards and two touchdowns this season.

Jackson was seen at practice Wednesday in red sweats and a red-and-white Bucs cap while walking without a noticeable limp. Earlier in the day, an NFL Network report said that Jackson's knee injury is serious enough to keep him out multiple weeks but that he's not expected to miss the rest of the season.

"We don't know about Vincent," quarterback Jameis Winston said. "We're just going to wish for the best. We know he's going to work hard and do his best. But guys have to step up. That's part of being in the NFL. ... This is how it works. And we're not going to look back."

Jackson, 32, has played in 74 consecutive games. He hasn't missed one since 2010.

In other injury news, tight end Austin Seferian-Jenkins returned to practice after missing the Bucs' past four games with a shoulder injury. At the time of his injury, Seferian-Jenkins led Tampa Bay in receiving with 139 yards and two touchdowns on seven catches.

Smith said it's too early to know if Seferian-Jenkins will return Sunday against the Atlanta Falcons.

"We're not there yet," Smith said. "Austin practiced on a limited basis. He was in pads today. But when he does come back, that will help."