Jacksonville, FL -- (Sports Network) - Jacksonville Jaguars wide receiver Mike Walker, and safety Reggie Nelson are both out for Sunday's contest against Denver.

Walker has knee troubles and was not on the practice field at all this week. The rookie out of Central Florida has 12 receptions for 161 yards in four games.

Nelson also did not practice this week due to a knee injury. The Jags' first- round pick in the 2007 draft has 11 tackles in three games. He has not played for the last two games, against Houston and Pittsburgh.

Defensive tackle Rob Meier did not participate in practice on Wednesday or Thursday, but did have limited participation on Friday and is listed as doubtful. The ninth-year pro from Washington State, has nine tackles and a sack in the Jags' first five games in 2008.