March 7-9: Teams can begin negotiating contracts with unrestricted free agents during this three-day window -- Contracts can't be signed until 4 p.m. ET on March 9. Don't expect the Dolphins to make a big splash. In previous years, they've signed three players who were arguably in the No. 1 free agent on the market: WR Mike Wallace, LT Branden Albert and DT Ndamukong Suh. Although the Dolphins won't likely spend big bucks on a single player in free agency, they'll likely need plenty of free agent help.