While the code words help disguise what the Lions are running on a play-by-play basis, teams can identify tells and tendencies simply by watchng the tape. As a result, Campbell knows that a lot of what the team likes to do is not a secret.

Cornerback Carlton Davis, who missed last week's game against Chicago with knee and thumb injuries, returned to practice in a limited capacity. On Tuesday, Campbell said he felt good about what Davis showed at practice,

The Detroit Lions host the Green Bay Packers on the Thursday night matchup for Week 14. Both teams are coming off wins on Thanksgiving. There has been considerable focus on the Lions injuries on the defensive side of the ball,

D.J. Reader missed his second straight practice Tuesday with a shoulder injury he suffered against the Bears, and Taylor Decker is doubtful.