According to Pro Football Talk JP Losman has signed a one year deal with the Oakland Raiders. 

It was not confirmed on the Raiders homepage yet.

This most certainly means Gradkowski is done for the year but I have not heard any official announcement.

PFT also cites that the Raiders' were impressed by JP's play and development in the UFL under head coach Jim Fassel.

This story will lend to a ton of speculation about coaching and Quarterbacking in Oakland.

Let the QB carousel continue in Oakland.