FLORHAM PARK, N.J. -- Chris Owusu suffered three concussions in a 13-month span while at Stanford. Now, the Jets receiver, who missed practice Wednesday, is in the concussion protocol for the second time since August.

Coach Todd Bowles said Wednesday that Owusu wasn't diagnosed with a concussion until the team flew to New Jersey after Sunday's loss in New England.

"He felt it after the game and we checked him out," Bowles said of Owusu, who suffered his first concussion with the Jets Aug. 7 during a training camp practice. "Anybody that's had that many, you've got to have some concern for. We're just going to monitor and see how it goes, but that's very concerning."

Owusu, a standout in camp, has six catches for 80 yards in three games, including a 43-yard reception.

O-line insurance

Because Nick Mangold was unable to practice and his status for Sunday's game in Oakland is uncertain, the Jets signed offensive lineman Wesley Johnson to the active roster. "We just want to be prepared so we made the move with Wes just in case," Bowles said, adding that Johnson and backup Dakota Dozier are both taking reps at center. Mangold injured his neck in the Patriots game and had to be carted to the locker room, but test results Monday came back negative.

advertisement | advertise on newsday

Bowles did say that "it's conceivable" Mangold could play without practicing.

Jet streams

Willie Colon (knee), Eric Decker (knee), Bilal Powell (ankle) and Calvin Pryor (ankles) also did not practice . . . Buster Skrine (shoulder, hand) was limited, as was Devin Smith, who injured his ankle in practice . . . Chris Ivory (hamstring) and Ryan Quigley (shin) practiced fully. With Quigley able to punt, the Jets released punter Steve Weatherford. The Jets also signed LB Quanterus Smith to the practice squad.