Veteran wide receiver Austin Collie signed with the New England Patriots.
Collie had at least three concussions in four seasons with the Indianapolis Colts. He worked out for the Patriots in June, but wasn't signed. He was still recovering from patellar tendon replacement surgery but later signed with the San Francisco 49ers.
Collie told teams in free agency he was willing to sign a waiver if necessary to return to football despite his concussion history.
Collie had just one reception in 2012 but had 16 touchdowns and 143 total receptions in 42 games with the Colts.
Aaron Dobson said he has back and neck pain stemming from last week's endzone collision at Atlanta and the rookie might not play Sunday. The Patriots are also uncertain when Danny Amenolda (groin) and tight end Rob Gronkowski (forearm, back) will return.