The Chiefs have signed 29-year old QB Quinn Gray.  Gray will serve as Tyler Thigpen’s backup for now but he is more than capable of starting if something happens to him.  Gray played in 8 games for the Jaguars last season and he completed 80 of 144 passes (55.6%) for 986 yards with 10 TD passes and 5 interceptions (85.6 QB Rating).  He also carried the ball 19 times for 57 yards (3.0 ypc).  Gray has now played in 11 games in his NFL career and he has completed 101 of 180 passes (56.1%) for 1,252 yards with 12 TD passes and 5 interceptions (88.5 QB Rating).  He has also carried the ball 24 times for 84 yards (3.5 ypc) with 2 TD runs.  The Chiefs have decided to cut loose Ingle Martin and go with just two QBs this season.