With so much uncertainty at the quarterback position for the Chicago Bears this offseason, I wanted to wait for the Justin Fields decision to be made before diving into my annual theme mock drafts. Fields is in Pittsburgh, and all signs point to Chicago taking a quarterback at one. The recent trades for offensive lineman Ryan Bates and receiver Keenan Allen leave the Bears with only four draft picks, so I would expect GM Ryan Poles to make a move at some point to acquire more picks. However, there are no guarantees he’ll find a partner wanting to trade up. If he…