The Raiders have signed QB Colt Brennan.  I’m really interested to find out what the thinking was here in bringing Brennan in.  The Raiders already have Jason Campbell, Bruce Gradkowski, Kyle Boller and Charlie Frye at QB for the 2010 season.  You would think that Brennan’s agent would have been looking for a team with less depth at QB to give him a legitimate chance to get his career going.  Brennan will be a longshot to make the Raiders’ opening day roster.