If the Bears can trade down out of the No. 3 pick Thursday night there's a good chance that scenario will be centered on North Carolina quarterback Mitchell Trubisky. The challenge for general manager Ryan Pace, as another NFC personnel man sees it, is at least half of the teams in the top 10 are interested in trading down to add depth to a draft some believe offers similar value from about the 20th pick to the 50th, meaning Round 2 is fertile ground. Every club's draft board is different but the idea that this draft offers excellent depth into Round 2 (and much further at cornerback, running back and tight end) is a common belief. It's also a poor draft if you're in need of an offensive tackle, particularly one on the left side, and the crop of linebackers is mighty thin. The 49ers would love to trade down from No. 2 and add to the collection of 10 picks they hold in the first draft for the new GM-coach combination of John Lynch and Kyle Shanahan.