The 2015 NFL season is in the books -- and now it's time to turn toward the 2016 . Before the NFL shines the spotlight on the next crop of incoming talent, Bucky Brooks is taking a division-by-division look back at each NFL team's 2015 rookie cla s, providing grades and highlighting what teams should be focusing on when they head to Indianapolis.John Fox's debut season in the Windy City didn't produce a playoff appearance, but the wily coach certainly put down a foundation that could lead to a succe sful run in the near future. Although he didn't get a single contribution from his top pick (, who ), Fox coaxed solid production from an underrated rookie cla s. appears to be the heir apparent to soon-to-be-free-agent 's RB1 spot after ama sing over Josh Green Jersey 800 total yards from scrimmage and scoring seven touchdowns (six rushing, one receiving). solidified the pivot position during the middle of the season, exhibiting solid instincts and awarene s as the primary communicator along the front line. and earned their stripes as rookie starters on a revamped defense. Each flashed the toughne s and competitivene s expected from a franchise that traditionally hitches its wagon to the defense. Grade: BCombine focus: The , who have the No. 11 pick in Round 1, must continue to addre s the defensive side of the ball to gain ground on their NFC North rivals. The team's lack of pa s rushers will prompt officials to take extended looks at Eastern Kentucky's and Georgia's as hybrid playmakers, but the team could also focus on Oregon's and Clemson's talented duo ( and ) as potential five-techniques in its 3-4 system. The void at inside linebacker could lead team officials to pay close attention to Alabama's and Mi souri's at the combine.The ' disappointing play at the beginning of the 2015 season prompted owner Martha Ford to revamp the organization. General manager Martin Mayhew was relieved of his duties and coach Jim Caldwell after the team stumbled out to a 1-7 start. Part of the ' problems could be attributed to a rookie cla s that failed to play up to expectations. was widely celebrated as Barry Sanders 2.0, but he failed to deliver a single 100-yard rushing game in his rookie season. logged 14 starts at offensive guard, but the team's offensive line woes hindered 's ability to effectively play from the pocket. , who contributed as a nickel corner, looks like a keeper as a CB3. made minimal contributions at defensive tackle; the team needs more from the big-bodied defender in Year 2. Grade: CCombine focus: The need for a true CB1 has been one of the ' most pre sing i sues for nearly a decade, which is why the team will certainly take a long look at Florida State's , Florida's , Clemson's and Virginia Tech's . On offense, 's potential retirement could force the team to look at Mi si sippi's , Baylor's , Ohio State's and TCU's as WR1 candidates. Detroit owns the No. 16 pick.Despite an off year -- at least, according to their lofty standards -- the should be encouraged by the promising play of their rookie cla s. The team got immediate contributions from their young DB tandem ( and ) and an unheralded inside linebacker (). These three played key roles on a defense that carried the team into the Divisional Round of the playoffs. teased Tyrell Terry Jersey ' teammates and coaches with his talent, but injuries prevented him from making a bigger impact as a WR3. was the star of the preseason; he looks like a diamond in the rough as a developmental quarterback prospect. Grade: A-Combine focus: After watching struggle without on the field, the could invest in a speed receiver as a potential succe sor on the perimeter. Baylor's , Notre Dame's and Ohio State's could garner significant interest from team officials. The team, which picks 27th in Round 1, also needs to upgrade the defensive tackle position, with poised to enter free agency. Thus, Green Bay will take extended looks at Baylor's , Alabama's and Louisiana Tech's . The failure of the at inside linebacker experiment could prompt the team to peek at Alabama's and Mi souri's .Coach Mike Zimmer has engineered a quick turnaround in Minnesota behind a homegrown group of players who have developed rapidly under the gruff taskmaster. He worked his magic with 2014 rookies (QB) and (LB) during his first season at the helm, and he did it again with 2015 rookies , and , who played significant minutes in Minnesota's 11-5 campaign. Kendricks and Diggs, in particular, look like blue-chip players with immense potential. Each could shine as a front-line playmaker for a team that looks poised to stay atop the NFC North for several seasons. didn't make a huge impact as a first-year pro, but he made significant strides down the stretch and should be in line to crack the starting lineup in Year 2. Grade: ACombine focus: The , who have the 23rd selection in the first round, certainly will look to add more building blocks to a team that looks like a rock-solid contender. Finding help for Bridgewater in the pa sing game could prompt the team to spend more time studying the likes of Mi si sippi's , Baylor's , Ohio State's and Pittsburgh's as WR1 options. The team also could explore the running back market to see if there's a big-bodied runner capable of stepping in for down the road. Alabama's , Ohio State's and Arkansas' Alex Collins could draw interest as potential RB1s in the ' downhill system. Follow Bucky Brooks on Twitter .