sack, and intercepted a pass by Curtis Painter in a 17–3 win at the Indianapolis Colts. On November 29, 2012, the Jaguars fired head coach Jack Del Rio and defensive coordinator Mel Tucker was promoted to interim head coach for the rest of the season. Posluszny finished the season with 119 combined tackles (69 solo), a career-high nine pass deflections, two sacks, and two interceptions in 16 games and 16 starts. He finished seventh among all linebackers in overall grades from Pro Football Focus in 2012. 2012 On January 11, 2012, the Jaguars hired Atlanta Falcons' offensive coordinator Mike Mularkey. Mularkey opted to retain defensive coordinator Mel Tucker with Posluszny, Smith, and Session remaining as the starting linebacker core. On November 15, 2012, Posluszny recorded 15 combined tackles (nine solo), a pass deflection and intercepted a pass by Matt Schaub during the Jaguars' 43–37 loss at the Houston Texans. In Week 17, he made ten combined tackles and sacked quarterback Jake Locker twice as the Jaguars lost 38–20 at the Tennessee Titans. This marked his first career multi-sack game. He set a single-season franchise record with 139 combined tackles (106 solo), seven pass deflections, three interceptions, and two sacks in 16 games and 16 starts. In 2012, Pro Football Focus gave Posluszny an overall grade of 45.0. His overall grade ranked 47th out of 53 qualifying linebackers in 2012. 2013 On January 10, 2013, the Jaguars fired head coach Mike Mularkey after a single season where the Jaguars finished 2–14. On January 17, 2013, general manager Dave Caldwell announced Seattle Seahawks' defensive coordinator Gus Bradley as the Jaguars' new head coach. Defensive coordinator Bob Babich retained the 4–3 base defense and Posluszny remained the starting middle linebacker alongside outside linebackers Russell Allen and Geno Hayes. On October 13, 2013, Posluszny recorded seven solo tackles, deflected a pass, and returned an interception off a pass by Peyton Manning for a 59-yard score to mark his first career touchdown in the Jaguars' 35–19 loss at the Denver Broncos. It was the first interception thrown by Manning in his record-setting regular season. In Week 10, Posluszny made eight combined tackles in a 29–27 win at the Tennessee Titans. He left during the third quarter after suffering a concussion and was named AFC Defensive Player of the Week for his performance. The concussion sidelined him for the Jaguars' Week 11 loss to the Arizona