The JAG designation has been used to mean "just another guy" meaning a lunchpail player, with adequate skills to be a backup or to start as needed. Some would call Burgess or Wright JAG's. Arrington is a JAG. At this point in his career, Morris is a JAG. Stanback is a JAG. Most considered Banta-Cain a JAG when he was signed. Ninkovich certainly qualifies.
Many backups who aren't young developmental players could be JAG's.
Belichick has always gotten solid production from depth players who are only average nfl players, with players who are "just another guy" and available on the waiver wire or in free agency.
