Brents (neck/concussion) did not practice Wednesday, Marcel Louis-Jacques of ESPN.com reports.
Brents reported concussion symptoms following the Dolphins' Week 7 win over the Jets, per Alain Poupart of SI.com. Brents will have two more opportunities to practice this week, but he would not be eligible to play against the Patriots on Sunday unless he's cleared from the league's concussion protocol by an independent neurologist.