Having depth is so important on a football team. It helps pick up the slack for lacking positions and can save a season if the roster is hit with a multitude of injuries.
Nick Saban and Alabama are well aware that they must create more depth amongst the team especially with what transpired last season.
Not only did the Crimson Tide have to give extensive snaps to over five freshmen on the defensive side of the ball last season due to injury, but Alabama also distributes a large portion of its talent every season to the NFL draft.