Adrian Peterson, RB, FA
Peterson tore his meniscus early in 2016 and then tried to return late in the season, but tried to return too quickly. It appears Peterson's robotic frame is finally beginning to breakdown. He will be 32 soon and likely will need to take a pay cut and is not assured a starting job. So much depends on where he lands, but I would need him to be assured a starting job before investing anything in him for 2017 since he's best when getting 20 carries versus playing in a committee.
Rob Gronkowski, TE, Patriots
Gronkowski had surgery on his back for the third time in his career last season. While healthy, he was an absolute beast on the field, but he only appeared in six games. Back injuries are serious, but the fact that he continues to return from them and still be the best tight end in the league does say something as well. His ADP seems to have dropped, as Fantasy Football Calculator has him at the 23rd player going off the board right now, whereas he was the ninth player off the board last season. That drop puts him as a late second-round pick, which I believe is a fair spot for him and one I would grab him at.
A.J. Green, WR, Bengals
Green missed seven games last season due to a hamstring tear, but for the most part, he has been healthy throughout his career, missing five games in his first five seasons. He actually was ready to return for the final two games of the 2016 season, but management held him out, much to his chagrin. I expect Green to be fine and have a good comeback year. I don't love Andy Dalton, but his 18 touchdown passes in 2016 were a career low. Dalton should move closer to his average next season, and a healthy Tyler Eifert and Green will make things tough on defenses.
Dez Bryant, WR, Cowboys
Bryant has had some tough luck of late with injuries to himself and his quarterback, but there's no doubt he's still got it and that he showed a good rapport with Dak Prescott, grabbing eight touchdowns on just 97 targets. A full offseason and training camp with Prescott should make for an even better connection next season, and the consistency of the running game and red-zone appearances will help Bryant continue to see end-zone targets.
Eddie Lacy, RB, FA
Lacy truly is a wild card for this coming season. If I had to predict, I'd say he signs with the Packers again, but that, of course, isn't certain. His weight and ankle issues will hurt his value in free agency, but we do know the guy can play football when healthy. If the Packers hold on to him, I still believe in his ability enough to grab him in fantasy drafts, but much will depend on where his average draft position falls. Right now, he's going off the board as the 21st running back in the fourth round, which sounds scary. If he has the inside slant to the starting job though, I'd take that risk.
Jamaal Charles, RB, FA
J.C. Superstar is a once-in-a-lifetime talent, and even with a lost step, he could easily be a useful fantasy piece at 10-12 touches a game. Much will depend, however, on where he lands and if he's lost two steps instead of one. As long as he's looking healthy in training camp, I'm willing to take a shot on him in PPR leagues, but his name value could boost his stock up too high. The fact that Charles was cut helps depress that name hype a little, but it is a long offseason and his value will fluctuate with every news report.