The NFL offseason kicked into a higher gear on Monday with the unofficial start of free agency as the legal negotiating window has opened up. With it has come an array of teams coming to terms in principle on contracts leading up to when they can become official on Wednesday at 4 p.

With the NFL free agency tampering period starting on March 10, there have already been some big splashes, both through free agent signings and trades. Teams have been attacking weaknesses early, especially the teams with plenty of cap space.

NFL's free agency kicked off with a busy first day of legal tampering on Monday, where there were some big moves made across the league -- from splash signings to blockbuster trades. The Chicago Bears kicked off free agency with the big additions of center Drew Dalman (three years,