Receiver James Jones, who was impressive as a rookie for the Packers in 2007, could spend the first game of 2008 on the sidelines.

Per Jason Wilde of the Wisconsin State Journal, Jones suffered a sprained knee during Friday night’s preseason game against the Broncos.  The injury, previously thought to be a bruise, could keep Jones out of the September 8 opener against the Vikings.

This would bump Ruvell Martin up to No. 3 and rookie Jordy Nelson to No. 4 on the depth chart.

Jones appeared in every game a year ago, starting nine of them.  He caught 47 passes for 676 yards and two touchdowns.  His best performance came on a Monday night at Denver, where he generated 107 yards on three catches, including a 79-yard touchdown.