Walker was selected in the seventh round (210th overall) in the 2009 NFL draft.[1] Falcons re-signed Walker to a one-year, $1.26 million contract on March 13, 2012.
Oakland Raiders
Walker signed with the Oakland Raiders on March 18, 2013.
Kansas City Chiefs
On March 14, 2014, he signed a three-year deal with the Kansas City Chiefs.[2] He was released by the team on March 6, 2015.
Denver Broncos
On March 12, 2015, Walker signed with the Denver Broncos.[3] On February 7, 2016, Walker was part of the Broncos team that won Super Bowl 50. In the game, the Broncos defeated the Carolina Panthers by a score of 24–10.[4] Walker recorded two tackles in the Super Bowl.[5] On August 19, 2016, Walker was placed on the Broncos' injured reserve.[6]