With the offseason officially underway, will examine what's next for all 32 teams. The series continues with the . What's changing? James Bettcher taking over the defensive coordinator role from Todd Bowles will have the biggest impact on the next season. Bowles performed masterfully utilizing the team's strengths, designing schemes and overcoming a unit tattered with injuries. Bruce Arians speaks glowingly of Bettcher, but most first-year play-callers have growing pains. Making it doubly difficult on Bettcher will be a defense that could be gutted by free agency and is in need of upgrades in the front seven. Biggest free agents CB : Cromartie brought a perfect complement to in his one year in the desert. Cromartie's size and ability to match up with any opponents' No. 2 receiver allowed the Cards to blitz heavily. There is a lot of speculation about Cro returning to the . If the cornerback departs, it could cause a shuffle that would likely send out of the slot spot, where he fits best. and : Not much is being made of Williams' potential departure, which would leave a significant hole along the defensive line. Williams, along with Kelly -- who was plucked from the scrapheap a year ago -- played a significant role plugging the running game and taking up blockers. The play of the linemen last year allowed Bowles to unleash his ma sive blitzes and not fear being gashed. Other Simon Nemec Jersey key free agents: TE , DE , OLB , RB On the way out? : After inking to a new cap-saving contract, Arizona decided to release Dockett, saving the team $6.8 million. Coming off an ACL tear, Dockett was the best front-seven player on the ' roster. Given their uncertainty along the line, there is still a chance Arizona brings Dockett back at a reduced price. : The center is scheduled to count $4.275 million against the cap and would save the $3.15 million if cut. The 31-year-old started every game in 2014, but was mediocre at best -- Pro Football Focus ranked him 40th out of 41 centers. With the much cheaper and younger able to play center, Sendlein could be on the way out. After the team cut Jr. this week, Sendlein appears the next likely player to be given walking papers. What they need The linebacker position sorely needs additions and upgrades. On the inside, the team is so hard up that veteran was signed as a coach with the option to continue playing if needed. Even if Abraham returns and plays at a high level, the outside 'backer position needs vast upgrading. The Cards have acknowledged that they need a thunder runner to pair with 's lightning. A future quarterback project might also be in the mix if Arians decides can't be the guy. Oh, and the guard position could use an upgrade as well. As you can see, Keim has loads of work ahead this offseason. Offseason crystal ball The will lower Dockett's contract number without having to cut the three-time selection. They won't, however, be able to retain Cromartie, leaving them to enter the offseason with Peterson and Powers on the outside and dropping down to cover the slot at times. Keim will also use a high-round pick on a running back to pair with Ellington in the backfield. The latest Podcast and tells you which big-name players could be released. Find more content on . Dylan Wendt Jersey