Some schools invite certain players to walk on. They are called "preferred walk-ons." They are lured with the promise that they will be given a serious chance to earn a scholarships. They are usually positions which the coaches do not wish to burn a scholarship on for example kicker, holder, deep snapper, special teams players. PS: If you earn the starting job in your skills area you go to the top of the waiting list for the next available scholarship.
This post was edited on 2/4 3:32 PM by stagedoor71