Rodney Johnson, an assistant coach at Boston University last year under John Kuester, will join Kuester's basketball staff at George Washington. The appointment completes Kuester's full-time staff for 1985-86 . . .

John Boucher allowed seven hits in going the distance and Mark Miller and Tom Davis each drove in four runs as George Mason defeated Iona, 11-2, in the winners bracket of the double-elimination Eastern College Athletic Conference tournament in Greenville, N.C.. In an earlier game, East Carolina eliminated New York Tech, 5-4.

George Mason (37-21) will play the winner of today's East Carolina-Iona losers-bracket game for the championship at 7 p.m. . . .

Army defeated Navy in golf, 356-396, and Navy defeated Army in tennis, 8-1, yesterday in the the last two sporting events of the year between the two academies.

The academies face each other in 21 sports annually. The final total for 1985: Navy 10 wins, Army 10 wins, and one tie, in wrestling . . .

The Pacific Coast Athletic Association's 1984 football championship, forfeited by Nevada-Las Vegas because of the use of ineligible players, has been awarded to Cal-State Fullerton . . .

The West Virginia University Board of Advisers voted to recommend that WVU remain in the Atlantic 10 Conference while "aggressively pursuing" formation of an all-sports eastern conference.