Whitehair signed with the Raiders on Monday.

Whitehair was released by the Bears on Thursday.

Whitehair (knee) practiced fully Thursday.

Whitehair (knee) is officially inactive for Saturday's game versus the Bills.

Whitehair (knee) is doubtful to play Saturday against Buffalo.

Whitehair (knee) was activated from injured reserve Friday, Larry Mayer of the Bears' official site reports.

Whitehair (knee) is expected to be activated from injured reserve ahead of the team's Week 9 matchup with the Dolphins, Adam Hoge of AllCHGO.com reports.

Chicago designated Whitehair (knee) to return from injured reserve Wednesday, Aaron Wilson of ProFootballNetwork.com reports.

The Bears placed Whitehair (knee) on injured reserve Wednesday.

Whitehair (knee) is "going to miss some time," according to head coach Matt Eberflus, Kevin Fishbain of The Athletic reports.