Kevin Grevey, injured Washington Bullet guard, worked out with the team for the first time in a month yesterday, but it is still uncertain when the two-year starter will be activated.

Grevey, who has played in only six games this year, was placed on the injured list Nov. 3 because of hamstring injury. He has had a history of such injuries since coming into the NBA five years ago.

In the past month, the 26-year-old Grevey has undergone numerous tests and rehabilitation exercise administration by team therapist Bill Neil and the National Institutes of Health.

"They didn't fund anything structurally wrong with me," said Grevey who moved and shot well in his first workout yesterday. "I have three weeks of weight training an strengthening under me, but I still want to be 100 percent well before I come back.

"I felt pretty good today," Grevey added after a 75-minute workout at Bowie State in preparation for tonight's game against the Denver Nuggets at Capital Center. "I am just not ready to play in any games yet.

"We as pros may make the game look too easy, but it's tough to play 20-30 minutes a night and I want to make sure I can do that and do it at 100 percent before I come back," Grevey said.

"I want to prove to myself that I can do that. "I'll work hard in practice and shoot around with the team the day of the games and then, by the end of the week or the first part of next week, I should be able to make a decision as to when I'll be back."

The Bullets are in no hurry to activate Grevey. They, too, want to be sure the hamstring problems don't recur.

Grevey started in the first five games this season before pulling his right hamstring against the Detroit Pistons at Capital Center Oct. 24. He sat out two games, then pulled his left hamstring against the Cleveland Cavaliers Oct. 31. He hasn't played since.

He was averaging 11.8 points and shooting 39 percent when he was put on the injured list three days later.

Phil Chenier has started in Grevey's place, but after some impressive performances, has been struggling. In the last six games, Chenier has shot only 36 percent (26 of 73) from the field and has committed 13 turnovers while averaging 22 minutes a game.

The Bullets have indicated that Gus Bailey, a former free agent who has played well in limited duty, will be the most likely casualty, barring trades or injuries, when Grevey is activated.

The 6-foot-5 Bailey is an exceptional rebounder and defensive player but he does not have the offensive talents of the other big guards -- Chenier, Grevey and Roger Phegley.

Because the shooting guard is such a key scoring spot in the Bullet offense, it appears that Bailey really is not competing with the big guards, but with playmakers Kevin Porter and Larry Wright.

The history of physical problems with Chenier and Grevey makes it difficult for the Bullets to trade or cut either of them or depend totally on one or the other.

Porter apparently has grasped Coach Dick Motta's offense now and has played well lately. The other guard on the roster, fourth-year man Larry Wright, has been struggling, but he is the backup playmaker to Porter. Wright also is capable of playing the shooting guard spot, but he is barely 6 feet, making a Wright-Porter combination unfeasible.

Realistically, the Bullets will choose between Bailey and Wright for the fifth guard spot when Grevey is activated.

"In a situation like this, you just bide time trying to let the situation remedy itself," General Manager Bob Ferry said.

The Nuggets deactivated Anthony Roberts yesterday and signed free agent Glen Gondrezik . . . David Thompson is the leading Nugget scorer with a 20.5 average and Dan Issel is next at 20.4. George McGinnis is their top rebounder, collecting 11 a game . . . Nugget guard John Roche is second in the league in three-point shot accuracy, having made 11 of 24 . . . The Nugget won-lost record is 8-15, one of their worst starts ever. They have lost eight of 10 on the road . . . Elvin Hayes didn't work out yesterday because of a sore knee, but is expected to play tonight.