THE ASSOCIATED PRESS

ORCHARD PARK, N.Y. -- It didn't take long for injuries to catch up with the Buffalo Bills defense, which has three starters nursing injuries.

Starting middle linebacker Paul Posluszny is expected to miss about six weeks after having surgery to repair a broken bone in his left arm, and both starting defensive ends were also on the team's injury report after practice Wednesday. Chris Kelsay's status is uncertain after he missed practice with a bruised knee, while Aaron Schobel has a sore back as Buffalo prepares to host Tampa Bay on Sunday.

Coach Dick Jauron said Posluszny's surgery went well and the team is hoping he'll return before Week 8.

Posluszny was hurt in the first half of Buffalo's season-opening 25-24 loss at New England on Monday. Though it's unclear when he was hurt, Posluszny had his arm wrapped and continued playing with the injury before leaving the game during the second quarter.

By coincidence, Posluszny sustained a season-ending injury after breaking two bones in the same arm at New England two years ago.

Backup Marcus Buggs, who appeared in only four games as a rookie last year, is pegged to take over for Posluszny and also be responsible for calling the defensive plays.

"Buggs can run the defense. He takes command of the huddle," defensive co-ordinator Perry Fewell said. "I don't anticipate any lack of production as far as Marcus Buggs is concerned."

Jauron listed Kelsay as day to day after he missed practice. It's unclear whether he'll be able to play this weekend because of the extent of the bruising in his knee. Kelsay was hurt late in the second quarter after colliding with teammate Ryan Denney.

Schobel, who had complained of a sore back on Tuesday, took part in the entire practice, but was added to the injury report late in the afternoon. He had a solid debut to the season, returning an interception for a touchdown and adding a sack against New England.

Tight end Derek Fine (hamstring) and cornerback Drayton Florence (knee) practiced on a limited basis.