When Chicago Bears' general manager Ryan Pace and his staff are scouting college players and potential free agents for the 2017 season, they need to identify who, from the current roster, are going to be their core players moving forward. Pace may be a best-player-available drafter, but doubling down on some positions, positions where a clear cut #1 is in place, doesn't always make sense.
Take center for example, rookie Cody Whitehair looks like a future Pro Bowler, so I can't see Pace picking another center early in the draft. Especially with the two starting guard positions manned by Pro Bowlers as well.