Three 7-foot players will be the centers of attention in the eight annual McDonald's Capital Classic, Thursday at 8 p.m. at Capital Centre.

The Metro all-star team, winner of the last three games, features 7-foot Patrick Ewing from Cambridge, Mass., who will attend Georgetown next fall. The U.S. team's 7-footers are Stuart Gray of Granada Hills, Calif., and Greg Dreiling of Wichita, Kan. Gray, averaging 31 points, will attend UCLA, Dreiling Wichita State.

Because of an NCAA rule change, this may be the last year for the Classic. The new rule limits all-star games to players from adjoining states and players to only two games. The NCAA granted the Classic a waiver this year because the game was set before the rule change.

Metro Coach Joe Gallagher of St. John's will have DeMatha forward Adrian Branch, and 6-foot-5 guard Jeff Adkins, both headed for Maryland, to complement Ewing.

Guard Chris Mullin of Brooklyn, N.Y., averaging 30 points a game on 68 percent field goal shooting, gives U.S. Coach Ray Mullis of Baltimore's Cardinal Gibbons an outside threat.

A 6 p.m. preliminary game features a combined Maryland and Virginia all-star team against all-stars from the Interhigh and Prep leagues.