The 2016 NFL season came to a close Sunday evening with Super Bowl 51, and now all 32 teams are formally into the offseason. The end of the Super Bowl is the first of many important dates for veterans around the league. Rosters were frozen during the playoffs, which meant teams could not release players or sign free agents to contracts. Teams could sign players to reserve/future deals, but those are not the more formal contract we normally see.
This means, we can expect to start hearing about veterans getting released. I imagine it might take a few days to really get into full swing, but sooner rather than later, notable names will likely hit the market.