Philadelphia Eagles quarterback Michael Vick, sidelined with a concussion, is still not cleared to participate in team practices, the Eagles said Thursday. Vick suffered what Coach Andy Reid described as a \"significant concussion\" in a game against the Dallas Cowboys and has been unable to play since. Philadelphia, which again plays the Cowboys Sunday, has lost its last seven games and is 3-8 on the year. Only Kansas City (1-10) and Jacksonville (2-9) have worse records in the NFL. Vick has been injured often in his career and appeared in all 16 games just once (2006) over his 10-year NFL career. Rookie Nick Foles had started at quarterback for the Eagles the last two games and will likely draw the starting assignment Sunday. He has completed nearly 60 percent of his passes for 542 yards, one touchdown and three interceptions this season.