EMMITSBURG, MD., OCT. 18 -- The Washington Bullets got more bad news today when forward Tom Hammonds's left foot was placed in a cast because of a strained tendon. Hammonds will miss about 10 days.

The foot, he said, has been bothering him since before training camp. Just before camp started, he got a bone scan on the foot. The scan was negative. He was examined by team physician Richard Grossman this afternoon.

"It kept hurting me," he said. "But I tried to play through it. The doctor said it had the symptoms of a stress fracture . . . I knew something was wrong with it. He said the best thing is to put it in this cast before the season starts and get it out of the way."Walker Still Ailing

Darrell Walker's Achilles' tendon continues to bother him, to the point that the guard will not make the trip to Canada this weekend with the team. He will stay in Washington and receive treatment for the chronic tendinitis that has plagued him for a couple of years.

Walker was hoping a summer treatment program in Little Rock, Ark., where he lives in the offseason, would give him relief for the upcoming season. He said he felt better at the start of training camp, and even though he was limited to just one practice a day, the tendinitis flared up again.

The left Achilles' tendon bothered him in the exhibition opener Sunday, and he didn't make the trip to Iowa City for Tuesday's game with the Bulls. He is expected back Monday.Bye-Bye Bonebo

The roster was reduced to 16 in-house players today when the Bullets cut 7-foot-3 center Michel Bonebo. He played in one of the two preseason games but really didn't have much of a chance; he now can return to a teaching job at a private school in Maine. The school had given him a leave of absence while he tried basketball.