Barbee played as a postgraduate in 2009 after earning his degree in parks, recreation and tourism. The Shelby, N.C., native saw action in all 12 games, starting six contests at guard and center.
Floyd graduated in December with a degree in business administration after playing in every game last season and starting two. He finished the 2009 campaign ranked fifth on the team with 56 tackles from his safety position.
Wilson, a communications major, led the ACC in touchdown passes last season with 31 - the fourth-best mark in the nation and the second-best in NC State history. He also set an NCAA record during the 2009 season by attempting 379 passes without an interception (dating back to 2008). He is on track to graduate in May.