Charles Leno Jr. Jr. returns as the Bears' starting left tackle. One of the team's most pleasant surprises last year, the 2014 seventh-round pick from Boise State was inserted into the lineup early in the season after veteran Jermon Bushrod was injured and never relinquished the position.

The Bears remain high on Leno and are confident that he will continue to develop. They also believe that left tackle is his best position and have no immediate plans to move the 6-3, 305-pounder to another spot on the line.

The swing tackle behind Leno and Massie this year could be veteran Nate Chandler. The 6-4, 306-pounder signed with the Bears June 3 after spending all of last season on injured reserve with the Carolina Panthers due to a knee injury.

"It just shows me that [the Bears] believe in me," Chandler said after he signed. "I visited with other teams and things didn't work out. But it's just a great feeling to have someone who believes in the process that I've been going through and just gave me a chance to come out here and compete."

The offensive tackle position is still relatively new to Chandler. He entered the NFL with the Panthers in 2012 as an undrafted free agent defensive end and played in 10 games on that side of the ball as a rookie, all as a reserve.