The Atlanta Falcons entered training camp with a veritable all-star team on offense with the exception of the unproven commodities up front.

The offensive line questions grew more pressing Tuesday when right tackle Mike Johnson was carted off the field with a left leg injury. The injury was serious enough that Johnson departed the team's facilities in an ambulance according to The Atlanta Journal-Constitution.

Johnson was listed atop the first training-camp depth chart though 2012 third-round draft pick Lamar Holmes has seen increased first-team reps of late.