The Washington Bullets yesterday traded second-year center Dave Corzine to the San Antonio Spurs for second-round draft picks in 1981 and 1982.

Washington reduced its roster to 13 -- two more than the regular-season limit -- but cutting Lawrence Boston and rookies Francois Wise, a fourth-round pick from Long Beach State, Ken Dancy, a fifth-round choice from Chicago State and free agent Reggie Holmes from Belmont Abbey.

Corzine, a first-round Washington draft pick after graduating from DePaul in 1978, averaged 2.9 points and 3.5 rebounds per game in 78 contests last season. Corzine's departure means the Bullets probably will keep rookie Rick Mahorn, the club's second-round draft selection. Mahorn and free agent Carlos Terry have been impressive.

Boston, a former Maryland standout, joined the Bullets last year after Mitch Kupchak was placed on the injured list. Boston averaged 4.3 points and three rebounds in 13 games.

The Bullets, 1-1 in exhibition games, will play the Atlanta Hawks tonight in the first game of a Madison Square Garden doubleheader before traveling to Binghamton, N.Y., to play New Jersey Sunday.

Exhibition action continues next week, culminating with a Capital Center doubleheader Saturday when the Knicks and Bullets play following the New Jersey-Philadelphia opener.

The regular season begins Oct. 10, when the Bullets play the Detroit Pistons in Pontiac, Mich.