Atlanta's Mike Johnson carted off field

The Atlanta Falcons could be in trouble at right tackle.

Mike Johnson, who had been working with the first team throughout camp, suffered what appeared to be a serious injury to his left leg Tuesday. Johnson was carted off the practice field and taken away in an ambulance.

The Falcons had been thinking that Johnson was the likely candidate to replace Tyson Clabo, who was released in the offseason. But now the Falcons may have to consider other alternatives.

Second-year pro Lamar Holmes has been working with the second team, but it remains to be seen if he’s ready to step into a starting role. The Falcons may have to pick up a right tackle with some experience if it looks like Johnson is going to be out for an extended period.