What happens if Mitchell Trubisky outperforms Mike Glennon in the preseason? It’s a fair question. As of now, the Chicago Bears seem content to let Glennon begin the regular season at quarterback, in front of Trubisky and veteran Mark Sanchez, who missed the end of the offseason program with a knee injury. In fact, the Bears have bent over backwards to squash any perceived quarterback controversy between Glennon -- signed for $16 million guaranteed in 2017 -- and Trubisky -- drafted second overall in April. "In regards to Mike Glennon, Mike Glennon is our starting quarterback,” Bears general manager Ryan Pace said on draft night. “There’s no quarterback competition when Mitch gets here. Glennon is our starting quarterback.” “It was made clear to me about 10 minutes after [the Bears picked Trubisky], from a call from [general manager] Ryan [Pace], and the next morning again, the 2017 season is my year,” Glennon said in May. “Mike’s the starter, and I’m behind him all the way,” Trubisky dutifully said on SiriusXM NFL Radio. But again, what will the Bears do if Trubisky proves in August that he’s the best quarterback on the roster?