2011, Burnett recorded a season-high ten solo tackles as they routed the Oakland Raiders 46–16. He finished the season with 107 combined tackles (78 solo), a career-high 11 pass deflections, three interceptions, and a sack in 16 games and 16 starts. The Packers finished first in the NFC North 15-1 record and secured a playoff berth and a first round bye. On January 15, 2012, Burnett started his first career playoff game and recorded four combined tackles, two pass deflections, and intercepted a pass by Eli Manning as the Packers lost 37-20 to the eventual Super Bowl XLVI Champions the New York Giants in NFC Divisional round. 2012 Defensive coordinator Dom Capers opted to move Burnett to free safety after the Packers moved cornerback Charles Woodson to strong safety due to the release of Nick Collins after he suffered a severe neck injury in 2011. On September 30, 2012, Burnett recorded a season-high 14 combined tackles (eight solo) and deflected a pass during a 28–27 victory against the New Orleans Saints. In Week 8, he collected 11 combined tackles and sacked Blaine Gabbert in the Packers' 24–15 win against the Jacksonville Jaguars. On December 2, 2012, Burnett made seven combined tackles, three pass deflections, and intercepted two pass attempts by Christian Ponder during a 23–14 victory against the Minnesota Vikings in Week 13. He finished the season with a 123 combined tackles (88 solo), five pass deflections, two interceptions, and two sacks in 16 games and 16 starts. He was one of two defensive players in the NFL to play every snap in every game in the season, along with James Laurinaitis of the St. Louis Rams. Pro Football Focus graded him out as the 16th best safety in 2012. 2013 On July 15, 2013, the Green Bay Packers signed Burnett to a four-year, $24.75 million contract extension that includes a signing bonus of $8.25 million. Head coach Mike McCarthy named Burnett the starting free safety, alongside M. D. Jennings, who replaced Charles Woodson after his departure to the Oakland Raiders. On August 23, 2013, Burnett made one tackle before leaving the Packers' third preseason game against the Seattle Seahawks with a hamstring injury. The injury sidelined him for the first three games of the regular season (Weeks 1–3). In Week 11, Burnett recorded a season-high 12 combined tackles (six solo) during a 27–13 loss at the New York Giants.