Armstrong lost his starting job after the first two games. He didn’t play any defensive snaps in a loss at Detroit on Sunday and registered just one tackle in each of Oakland’s past four games.
Armstrong was cleared in Pennsylvania last week after being investigated for the taunting of a police dog, a third-degree felony, on the field prior to the Raiders’ game at Pittsburgh on Nov. 8. Authorities concluded that Armstrong did not act maliciously when he barked at the dog during warm-ups.
Armstrong, 24, was claimed off waivers last year by Oakland after the Rams cut Armstrong for an excessive amount of penalties while playing special teams. Armstrong had 21 tackles and one sack this season.
Meanwhile, tight end Lee Smith returned to practice Tuesday after missing the Detroit game with a wrist injury. However, starting center Rodney Hudson (ankle), running back Taiwan Jones (knee), linebacker Neiron Ball (knee) and cornerback Keith McGill (ankle) each did not practice. The Raiders tweaked their practice schedule this week due to it being Thanksgiving week. Oakland practiced Tuesday and will have a lighter day Thursday as it prepares to play at Tennessee this Sunday.