Brent Grimes had already been in the NFL for six seasons (2007-12) with the Atlanta Falcons, going to the Pro Bowl in 2010m but when he signed with the Miami Dolphins as a Free Agent in 2013, it was not likely thought that he would be the top Defensive Back with the team.
Reshad Jones played the entire decade with the 2010s with the Miami Dolphins, and the Georgia Bulldog was arguably one of the most underrated Defensive Backs during that time.
Miami Dolphin in the first six years and change of his career, Chris Chambers had an underrated career.
Randy Starks began his NFL career with four seasons with the Tennessee Titans, and putting it in a matter of fact terms; they were not extraordinary. The Dolphins signed him as a Free Agent in 2008, and after a year as a defensive role player, he found his niche.