"Obviously, it looks like Jacoby is going to miss a little bit of time, don't know exactly to what extent yet," Allen said. "We're still seeing where he's at."
Allen couldn't rule out the chance that Ford would miss the Sept. 10 season opener against the San Diego Chargers.
The Raiders have just three receivers who have ever caught a pass in the NFL, and all are nursing injuries. Darrius Heyward-Bey left the game Friday with a sprained shoulder that isn't believed to be serious. Denarius Moore hasn't played in the preseason as he recovers from a hamstring injury originally sustained during minicamp in June.
Allen said Moore is getting closer to returning, but the Raiders might need to look outside the organization for help at receiver.
Notes: LB Aaron Curry returned to the team after having his injured knee worked on in Los Angeles. Allen said he looked good running, and the team still needs to decide when to take him off the physically unable to perform list. ... TE Brandon Myers (shoulder) and RB Taiwan Jones (hamstring) could return to practice this week.
Copyright 2012 by The Associated Press