Jets' Nick Mangold (ankle) still not practicing; time to raise a red flag?

Seven-time Pro Bowl center Nick Mangold is still out with an ankle injury. Tom Szczerbowski/Getty Images

FLORHAM PARK, N.J. -- Nick Mangold's sprained right ankle still isn't right.

The New York Jets center, injured nearly five weeks ago, watched the start of practice in street clothes Wednesday as the team began preparations for Sunday against the New England Patriots. It's certainly not a good sign, especially after a bye week.

Mangold, who missed only four games in his first 10 seasons, has sat out for three straight games. Many figured he'd benefit from the bye week and would be good to go, but this is clearly more than a typical ankle sprain. He was injured in Week 7 when teammate Ryan Clady rolled up the back of his leg against the Baltimore Ravens.

Two weeks ago, Mangold admitted he suffered a setback, blaming his own "stupidity" for pushing himself too hard in his rehab. At the time, he sounded optimistic about his chances of returning at some point during the season even though he declined to specify the extent of the damage.

In other injury news, cornerback Marcus Williams (high ankle sprain) still isn't practicing. There's a chance he will miss his second straight game.