What does Alabama coach Nick Saban mean when he says O-line has zero starters?

Nick Saban doesn’t like expectations, but he’s created them. Not just for his Alabama football team, but for himself.
Admit it.
You come to a Saban press conference, like the one following the first scrimmage of fall camp, expecting something.
A sermon. A lecture. A rant.
The coach rarely disappoints, sometimes instigates and always informs when he turns into a preacher, teacher and motivational speaker, His message Saturday afternoon, as relatively subdued as it was, seemed directed at his offensive line.