the Miami Dolphins and recorded eight combined tackles and a sack as the Bills lost 15–10. He unfortunately left the game during the third quarter after sustaining an apparent knee injury while tackling running back Ronnie Brown with two teammates. The following day, it was revealed that Posluszny had suffered a sprained MCL and was expected to be sidelined for only two weeks (Weeks 2–3). On October 31, 2010, Posluszny recorded a season-high 17 combined tackles (11 solo) and broke up a pass during a 13–10 loss at the Kansas City Chiefs. In Week 13, he collected 15 combined tackles (11 solo) and sacked quarterback Tarvaris Jackson as the Bills were routed by the Minnesota Vikings 38–14. Throughout the season, Posluszny had ten games with at least ten combined tackles. He finished his final season in Buffalo with 151 combined tackles (103 solo), four pass deflections, and two sacks in 14 games and 14 starts. 2011 On March 1, 2011, the Bills assigned a one-year free agent tender to Posluszny. The tender became null and void, making Posluszny an unrestricted free agent after the signing of the NFL Collective Bargaining Agreement by the NFLPA that ended a four-month lockout. Although general manager Buddy Nix and Posluszny showed mutual interest on an extension, with Posluszny saying his first intention is to consider resigning. After his departure, Posluszny stated he felt he was not in their plans and not a fit for the team once Nix stated the Bills' desire to have him around 245–250 lbs. Jacksonville Jaguars On July 29, 2011, the Jacksonville Jaguars signed Posluszny to a six-year, $45 million contract that includes $13 million guaranteed and a signing bonus of $10 million. He entered training camp slated as the starting middle linebacker in defensive coordinator Mel Tucker's base 4–3 defense after the role was left vacant by Kirk Morrison who coincidentally departed for the Buffalo Bills. Head coach Jack Del Rio officially named him the starter along with outside linebackers Daryl Smith and Clint Session. He made his Jaguars regular season debut in the Jaguars' season-opener against the Tennessee Titans and made four combined tackles and a pass deflection in a 16–14 victory. On October 16, 2011, Posluszny recorded a season-high 16 combined tackles (nine solo) in the Jaguars' 17–13 loss at the Pittsburgh Steelers. In Week 10, he made six combined tackles, a pass deflection, assisted on a