Charles B. Rayburn Jr., who was fired as Groveton High School's football coach last November after he criticized the school's athletic program, has been reinstated by the Fairfax County School Board.

"We're delighted the school board saw fit to vindicate Coach Rayburn," said his attorney, George H. Cohen, who, on behalf of the Fairfax Education Association, which represents county teachers, had challenged the dismissal in federal court.

Rayburn, a mathematics teacher at Groveton, lost his coaching job, which paid $1,480, after the Alexandria Gazette had published an interview in which he said Groveton High was "operating sometimes with less than first-rate equipment with regards to proper safety."

Groveton officials have denied that Rayburn was fired because of the interview, but declined further comment.

The Portland Trail Blazers and San Diego Clippers have been unable to reach agreement on compensation for Bill Walton, and the matter is being turned over to NBA Commissioner Larry O'Brien.

Bowie State and North Carolina Central have been admitted to the 14-school Central Intercollegiate Athletic Association conference. The two new members won a three-day battle with Maryland-Eastern Shore. They will not be eligible for CIAA championships until the 1980-81 school year.

Senior catcher Bill Bolger and junior center fielder Steve Conroy of Catholic were named to the NCAA's All East second team all star baseball squad.