It takes a special skill set to play left tackle in the NFL, and Gaines is an intriguing prospect the Ravens will try to mold into a contributor. Gaines, who dominated at the Football Bowl Subdivision level at Tennessee State, certainly has the size to stick in the NFL. He is 6 feet 6 and 334 pounds with arms that are longer than 36 inches. But does he have the savvy and technique to play in the pros? The Ravens are trying to find that out.