Luis Matos is likely at least a week and a half from a minor league rehabilitation assignment. The Baltimore Orioles center fielder, who broke his right ring finger on May 10, began baseball activities on Saturday. He hit off a tee and did some throwing.

At this point, Matos is allowed to swing a bat only with his left hand. Once he can swing with both hands, which Matos believes will take at least three days, he will be a week away from the assignment.

"Right now we're taking it easy because the skin is very soft," Matos said. "They prefer I don't have setbacks."

Manager Lee Mazzilli said perhaps the most difficult part for Matos will be regaining strength in his throwing arm.

"I don't think that's going to be a big problem," Matos said. "I just need to take it easy and not get it sore."

Roberts's Status Uncertain

Second baseman Brian Roberts, nursing a sore right rotator cuff, said he isn't sure he would be ready to get back into the starting lineup on Monday.

"That would be a great situation," Roberts said. "I don't know if I can make it or not. I have no problem shooting for that." . . .

Since Erik Bedard has only been throwing on flat ground, Mazzilli said the pitcher, who is on the disabled list with a sprained left knee, will likely need a rehabilitation assignment. . . .

Perhaps it won't affect Baltimore so much losing the designated hitter during the next two series in National League parks. Entering Saturday, Baltimore's DHs are hitting only .218 (43 for 197) with six home runs and 28 RBI. The Orioles play in Pittsburgh and Cincinnati this week.