Orton already said he wanted to retire at the end of last season, this shouldn't have surprised them. Honestly the main thing that has screwed the Bills over is their franchise quarterback turning out not to be very good. It's a shame, and not an easy thing to see coming because he looked good in college, but these things happen. Orton was a stop-gap anyway, they should be able to sign or trade for another one of those if they can't draft anyone.