On January 19, 2009, Capers was named the Green Bay Packers defensive coordinator by head coach Mike McCarthy and general manager Ted Thompson, where he replaced the 4-3 defense Green Bay has used since 1992 with the 3-4 he used in Miami.[3] Green Bay's defensive ranking in his first year improved to second in the league in 2009, from 21st in the league in 2008.[4] On September 12, 2010, Capers' defense finished the season ranked 2nd in scoring defense, 5th in total defense, 2nd in interceptions, 2nd in sacks, and 1st in opposing quarterback passer rating, in spite of being decimated by injuries during the 2010 season.[5] On February 6, 2011, Capers lead a 5th ranked defensive squad and helped the Packers win the Super Bowl. During the playoff run his team had a pick 6 in the final 3 playoff games that year; Divisional Round (Williams), Championship game (Raji), and in Super Bowl 45 (Collins.) On September 8, 2011, Capers began the year where he would watch his defense finish in the bottom of the barrel after finishing 5th the prior year. Since 2011 his defensive rankings on yards per game have been ranked: 2011 – 32nd-ranked defense, 2012 – 11th, 2013 – 25th, 2014 – 15th, 2015 – 15th and now 2016 – currently ranked 18th after giving up 4 straight games of 30 or more points. His points per game rankings are 2009 – 7th, 2010 – 2nd, 2011 – 19th, 2012 – 11, 2013 – 24th, 2014 – 13th, 2015 – 12th and 2016 – 19th.