S Hamlin, FB Anderson also injured

Updated: December 9, 2009, 3:16 PM ET
By Calvin Watkins | ESPNDallas.com

SOUTHLAKE, Texas -- Dallas Cowboys backup tight end Martellus Bennett is suffering from a concussion and missed Wednesday's practice.

It is uncertain if Bennett, who suffered the injury against the New York Giants, will play Sunday vs. the San Diego Chargers.

Starting safety Ken Hamlin (ankle) and starting fullback Deon Anderson (knee) also missed practice for the Cowboys.

Terence Newman underwent an MRI on his knee that didn't reveal any structural damage. Newman, who didn't speak with reporters, did practice.

Calvin Watkins joined ESPNDallas.com in September 2009. He's covered the Cowboys since 2006 and also has covered colleges, boxing and high school sports.