The Ravens went to Atlanta with enviable depth at the tight end position. They boarded the homebound plane to Baltimore wondering how long Ed Dickson (shoulder) and Dennis Pitta might be sidelined. Dickson's injury appears to be the more serious of the two. He's scheduled for an MRI Friday to determine the severity of his shoulder injury which the team diagnosed initially as a sprain. Pitta is out for the preseason with a broken hand. It's likely neither player will return to the Ravens before Week 1 of the regular season. Dickson was third on the team with 54 receptions for 528 yards and five touchdowns last season. Pitta caught 40 passes and three touchdowns.