Quarterback Charlie Frye said Saturday that he intends to see a hand specialist to find out why his injured right wrist isn't showing improvement.
"I guess they just want to find out some more about what's going on in there because I can't throw a football," Frye said.
Frye has been out since Aug. 5, when he hurt his wrist bracing himself as he fell to the ground during practice.
Frye injured the same wrist late in the 2006 season and missed three straight games. He returned for the Cleveland Browns' regular-season finale.
Raiders coach Tom Cable said Frye's injury has everyone baffled.
"(We're) just getting enough information to understand what it is," Cable said. "There's no damage. We've MRI'd it, there's no damage that way in terms of a fracture or tears or anything like that."
Frye is competing with Bruce Gradkowski, Kyle Boller and Colt Brennan for one of two backup spots.