Dustin Keller carries the ball past the Buffalo Bills' Bryan...

Dustin Keller carries the ball past the Buffalo Bills' Bryan Scott after making a reception at MetLife Stadium. (Sept. 9, 2012) Credit: Jim McIsaac

**Updated @ 1:48 p.m.**

After the warm-up session, Keller and Stephen Hill walked over to the rehab area. Neither player did much of anything, aside from some stretching. ...LB Bart Scott (toe) and FB John Conner (knee) were spotted on the stationary bikes. ...NT Sione Po'uha (back) was not seen on the field during the 20-minute portion allotted to reporters. ...New acquisitions: WR Jason Hill (No. 89), RB Jonathon Grimes (No. 21), CB Aaron Berry (No. 22) and FB Lex Hilliard (No. 36) were practicing with their respective position groups.  

Rex Ryan's uncertainty over Dustin Keller's injury status is alarming, considering the Jets have now lost their top receiver, Santonio Holmes, for the season.

The Jets coach said Wednesday that he doesn't know if the tight end -- who already has missed three games due to a hamstring injury -- will face the Houston Texans (4-0).

Ryan added that Keller will not practice today, along with rookie wideout Stephen Hill (who also has a hamstring injury).

The depth at receiving corps was an obvious issue during the offseason -- well before a plethora of "soft-tissue" injuries rocked the group.

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