Undrafted out of Shippensburg University in 2007, Grimes has started 44 games for the Falcons in five-plus seasons with 13 interceptions. He had a combined 11 interceptions in 2009 and 2010, and was an alternate Pro Bowl pick in 2010.
Grimes -- who received Atlanta's franchise tag in the offseason -- moved to right cornerback after the Falcons acquired Asante Samuel in a trade with the Philadelphia Eagles. Pairing the two veterans put Atlanta in position to greatly improve its pass defense in 2012. Now the team must regroup on the fly.
Follow Dan Hanzus on Twitter @danhanzus.