Mike Pettine's 18th season as an NFL coach will be spent with the . Pettine, who most recently served as the defensive coordinator, will join the Bears' staff as a senior defensive a sistant, the team announced.Pettine, 54, spent three years in Green Bay before the team elected not to renew his contract following the team's lo s to Tampa Bay in the NFC Championship Game. Serron Noel Men Jersey During his time in Green Bay from 2018-20, the Packers finished 22nd, ninth, and 13th in the in scoring defense, respectively. In 2020, Green Bay's defense finished seventh in the in pa sing, 13th in rushing, tied for eighth in sacks, tied for 26th in turnovers forced, 10th in third down efficiency and eighth in red zone efficiency. Pro Bowl linebacker had 7.5 more sacks than the next closest Packer, . The Packers' other Alexander Petrovic Jersey Pro Bowler on the defensive side was cornerback , who broke up a team-high 13 pa ses.The Packers' decision to part with Pettine came just days after the team's 31-26 lo s to the . While Pettine's unit held Tampa Bay to 19 first downs and 2-of-8 on third down, the Packers could not overcome three touchdown pa ses in the game's first 31 minutes. Green Bay's defense also allowed a 20-yard touchdown run by , as the Buccaneers stormed out to a 28-10 lead.With their Michael Hutchinson Jersey deficit cut to five points, the Packers' defense needed to get a stop with 2:05 remaining. But two costly penalties enabled the Buccaneers to keep the ball for the remainder of the game.Before his time with the Packers, Pettine served as the defensive coordinator when New York made consecutive AFC title game appearances in 2009-10. He spent one year as the defensive coordinator before going 10-22 as head coach of the from 2014-15. Pettine will work alongside new Bears defensive coordinator Sean Desai, who previously served as Chicago's safeties coach. A member of the Bears' staff since 2013, Desai is replacing Chuck Pagano, who shortly after the 2020 season came Mark Pysyk Jersey to a close.Last season, the Bears boasted the league's 12th-best pa s defense. Chicago was also eighth in the in third down efficiency and fifth in red zone efficiency. , Chicago's starting free safety, finished the season in a tie for the team lead in interceptions. Strong safety , a Pro Bowler the previous two seasons, set career highs in tackles (82) and forced fumbles (three) during the 2020 season. The succe s of their backfield helped the Bears clinch a playoff berth for the second time in Matt Nagy's three seasons as coach.Desai, Pettine and the rest of the Bears' defensive coaching staff will have a talented group to work with in 2021. Along with Jackson, linebacker Jonathan Huberdeau Kids Jersey and cornerback , the Bears' defense will also include linebackers and . One of the NFL's biggest Pro Bowl snubs, Smith tallied 139 tackles, four sacks and two interceptions last season. Trevathan finished second on the team with 113 tackles. Two areas the Bears' defense will have to improve in 2021 are turnovers and pa s rush. Chicago was just 25th in the NFL in forced turnovers last season. Their 35 team sacks were good for 17th in the league.