Kevin King, Morgan Burnett miss Packers' Thursday practice

GREEN BAY - Rookie cornerback Kevin King was at practice Thursday, but he did not join his teammates in the padded work they went through in preparation for the Minnesota Vikings on Sunday.

King is in the NFL's concussion protocol after coming off the field in the first quarter of the team's 35-31 victory over the Dallas Cowboys last Sunday.

It is sometimes a sign that a player is close to being cleared when he is able to attend practice, but there are still hurdles for King to clear before he can be given the go-ahead to play against the Vikings. Typically, the Packers don't let anyone know whether an injured player is cleared until inactives come out on game day.

In addition to King, safety Morgan Burnett (hamstring) was not taking part in practice. The Packers would be without half their starting secondary if the two can't play Sunday. 

The top remaining cornerbacks are Davon House, Damarious Randall, Quinten Rollins and Josh Hawkins. Kentrell Brice, Josh Jones and Marwin Evans are behind Burnett.

Also missing practice were: linebacker Ahmad Brooks (back) and linebacker Joe Thomas (ankle).

Left tackle David Bakhtiari (hamstring) and running back Ty Montgomery (broken ribs) were both in pads and taking part in the individual drills during the portion of practice open to the media. However, it's not known how much they did in the team drills, which are the ones that matter the most when evaluating whether injured players are ready to return.

The Packers will issue their injury report later this afternoon.