While the first few days of NFL free agency get all the headlines, what teams do after the legal tampering period can go a long way in determining which actually end up building their roster most effectively. Last year, the Chiefs added late signings such as Donovan Smith and under-the-radar additions Drue Tranquill and Mike Edwards to fill out their depth chart. The Ravens built meaningful chunks of an excellent defense with players signed over the summer, including Jadeveon Clowney, Ronald Darby and Arthur Maulet.