Cincinnati Bengals
Signed free agent defensive tackle Tony Williams, who had been with the Minnesota Vikings, to a four-year contract.

Miami Dolphins
Re-signed free agent linebacker Twan Russell to a three-year contract.

Minnesota Vikings
Announced that center Matt Birk signed the team's tender offer

Signed long snapper Mitch Palmer and wide receiver Joey Kent to one-year contracts.

New England Patriots
Signed free agent linebacker Larry Izzo, who had been with the Miami Dolphins.

Tampa Bay Buccaneers
Signed quarterback Brad Johnson to a five-year contract.