Blue-chippers? Bears GM Ryan Poles has compiled solid list going into season — and it might grow

NASHVILLE, Tenn. — Battles for roster spots are one of the more dramatic parts of training camp, and there will be a flurry of activity for the Bears as they cut from 90 players to 53 by the 5 p.m. deadline Sunday. The top of the roster, however, matters a lot more than the bottom does. While there are always players such as wide receiver Jahdae Walker, who made the cut last summer and came up big months later with the tying touchdown catch in the final minute against the Packers, the players…