I'm thinking I gotta keep Foster and Peterson from group 1 which leave one more player to add.

In the 2nd group I have to keep Gronkowski so that leaves one more player to add from that group.

  

Assuming the value of keeping these guys are the same, I would def keep Foster, AJ Green & Gronk. I know WHite and Johnson are big names but theyre past their primes and have shown declining numbers in 2 -3 seasons straight. Then it comes down to how many QB's can you start, If it is just 1, I would take Adrian Peterson and throw the Qb's back into the pool and draft them, if its 2, I would take Rivers because he is elite, but would not kill u if u went Ryan, knowing Turner is slowing down and Julio Jones will take a huge leap forward. Once again, I don't know how many guys u can start, but from what I can tell Flynn and Tate aren't regular starters, and I never hold backup Qb's so I would go Tate