Four members of Duke's current football recruiting class already have enrolled in school and are taking classes.
Defensive back Zach Greene of Raleigh Leesville Road; defensive back Kevin Rojas of Raleigh Wakefield; tight end Ryan Hall of Orlando, Fla., and defensive end Sydney Sarmiento are expected to participate in spring drills.
Duke brought in only 17 football recruits last year so some or all of the recruits could count on last year's limit. The Blue Devils are believed to have 27 verbal commitments.
The commitments are not binding on the school or the players, but the players may sign national letters of intent next Wednesday.
Vince Oghobaase is believed to be the only other Duke recruit to enter school in the spring of his senior high school year.