Bears add Mitchell Trubisky, but when is he ready to play?

Biggest post-draft questions still to be answered by Chicago Bears:

Trubisky’s timeline: Mitchell Trubisky is the future at quarterback, but when does he start? The Bears already anointed Mike Glennon their No. 1 quarterback in 2017, but Trubisky is the second overall pick -- he can’t sit for too long. The key is Trubisky’s development. How quickly can Chicago’s coaching staff get him ready? Will the Bears break from standard NFL protocol and allocate a certain number of regular-season practice reps to their backup (Trubisky)? One thing is certain: Trubisky will not collect dust holding a clipboard. The clock is already ticking.

Where’s the D? In a draft supposedly loaded with defensive prospects, the Bears used four of five picks on offense. The lone defender chosen, Alabama safety Eddie Jackson, sustained a broken leg last year. Jackson also torn his ACL in 2014. In between, Jackson had a terrific career for the Crimson Tide, but medical concerns exist. The Bears have to hope Leonard Floyd, Jonathan Bullard, Nick Kwiatkoski, Deon Bush, Deiondre' Hall and DeAndre Houston-Carson make big jumps in year. And at linebacker, Chicago needs Danny Trevathan, Willie Young and Pernell McPhee to make full recoveries and stay healthy throughout the season.

Hidden gems: The Bears took three players from below the FBS level – the first time since 2002. Maybe Ryan Pace is the next Bill Polian. Or maybe he got too cute. Only time will tell, but the one word to describe this Bears' draft: unusual. Tight end Adam Shaheen, second round, Division II. Running back Tarik Cohen, fourth round, FCS school North Carolina A&T. Jordan Morgan, fifth round, Division II. That’s not what most expected to hear. How will they handle the step-up in competition? That’s a question no one can answer until the pads go on.