The Panthers have signed David Carr to be their new backup QB.  Jake Delhomme better perform better this season or Carr will take his starting job away from him.  Carr played in all 16 games for the Houston Texans last season and he completed 302 of 442 passes (68.3%) for 2,767 yards with 11 TD passes and 12 interceptions (82.1 QB Rating).  He also carried the football 53 times for 195 yards (3.7 ypc) with 2 TD runs.  This was a good move for the Panthers as it should light a fire under Jake Delhomme’s behind.