FLORHAM PARK, N.J. -- New York Jets projected starting cornerback Antonio Allen was not wearing a red jersey during the half-hour portion of Tuesday’s practice open to the media.

Allen, who suffered a concussion in the team’s third preseason game against the New York Giants, was wearing a red (non-contact) jersey when the Jets last practiced Friday, so it’s certainly a positive development as he looks to return from injury.

The Jets begin the 2014 regular season against the Oakland Raiders on Sunday at MetLife Stadium.

The only reason Allen, who has played safety his entire career, was moved to corner is because New York’s secondary is extremely depleted.

CB Dee Milliner (ankle) did some light jogging and agility work in the rehab area and is unlikely to play on Sunday.

Darrin Walls is the projected starter opposite Allen, with Kyle Wilson handling slot duties. Walls (leg) was in the rehab area, but his injury is not as significant as others.

Also in the rehab area Tuesday: S Josh Bush (quad), LB Nick Bellore (calf) and DE IK Enemkpali (foot).

TE Jeff Cumberland (Achilles) took a while to warm up, but was participating in position drills during the open portion.

Here are the numbers for the team’s newly acquired players: CB Leon McFadden (22), CB Phillip Adams (24), WR Walter Powell (18).