The San Antonio Spurs entered tonight's 137-106 runaway over the injury-hampered Washington Bullets with a simple but highly effective game plan.

"We knew they had been on an extended road trip and they were shorthanded with injuries, so our game plan was for us to come out and set the tempo and hopefully wear them down," said Spur Coach Stan Albeck. "We used our depth to force them into our game."

The two principal elements in the San Antonio blitz were three-time scoring champion George Gervin and rookie guard Johnny Moore.

Gervin, using his 6-foot-8 frame to override the defensive efforts of 6-1 Wes Matthews and 6-5 Kevin Grevey, scored 33 points, 26 in the first half.

Moore, a University of Texas alumni pressed into heavy duty because of muscle spasms that side-lined Spur captain James Silas, had a franchiise-record 19 assists and 17 points.

Washington Coach Gene Shue saw hiis team drop from the final contest of a five-game road trip in which it beat only expansion Dallas. But that Saturday victory was costly, as rookie Rick Mahorn broke his right hand.

"(Wes) Unseld is the foundation of our defense and our rebounding," said Shue of the Bullets' ailing center who missed the game. "We miss him."

The Bullets, headed home for two days of rest before returning to action Wednesday against the Los Angeles Lakers, will be without the 6-11 Mahorn at least three weeks.

The Spurs, who improved their home record to 18-4 while dropping the Bullet road mark to 4-18, outscored Washington, 24-7, over a 5-minute 20-second span of the second quarter to take control of the contest, 64-45, and were never threatened.

"We were really ready to play tonight," said Gervin, who helped the Spurs to a healthy 56.3 shooting percentage for the night. "We had to play well with Jimmy Silas hurt. I got us started early and things just opened up."

San Antonio had a 49-39 rebounding edge and turned the ball over 12 times while errors cost the Bullets possession on 22 occasions.

Elvin Hayes, thrust into the pivot for 44 minutes of heavy duty because of the injuries to Unseld and Mahorn, paced the Bullets with 26 points and 12 rebounds. Mitch Kupchak supplied 22 points and nine rebounds.

San Antonio, which leads the Midwest Division with a 31-15 mark, and the Bullets will conclude their two-game season series Saturday at the Capital Centre.