Broncos C Tom Nalen, who went on injured reserve Tuesday, reportedly has a "bone-on-bone" condition in his knee.
Broncos placed C Tom Nalen on injured reserve, ending his season.
Broncos C Tom Nalen has suffered a setback in his return from knee surgery and has been shut down from practicing.
Despite returning to practice this week, Broncos C Tom Nalen is expected to miss Sunday's bout with San Diego.
Broncos C Tom Nalen (knee) returned to practice on Wednesday.
The Broncos expect C Tom Nalen (knee surgery) to return to limited practice next week.
The Broncos believe C Tom Nalen (knee surgery) will be ready to play "early this season ."
Broncos C Tom Nalen will undergo his second knee surgery of the offseason Friday.
An MRI revealed no structural damage to Broncos C Tom Nalen's knee, coach Mike Shanahan confirmed.
Tom Nalen has a sore knee, and the Broncos are concerned enough to schedule an MRI.
Broncos C Tom Nalen (knee surgery) has rejoined the first-team offense.
Broncos C Tom Nalen will undergo arthroscopic knee surgery on Friday, but the team expects him to be ready for training camp.
Broncos C Tom Nalen (torn biceps) and G Ben Hamilton (concussions) are training together this offseason and say they're back to 100%.
Broncos C Tom Nalen will miss the rest of the season with a torn biceps.