Injured Washington Nationals second baseman Jose Vidro had a slight setback in his rehabilitation Thursday, suffering soreness in his right patellar tendon during a workout at RFK Stadium.

"It was just because, I think, I haven't done it in a long time," Vidro said yesterday. "You start running and pushing it hard, and it felt uncomfortable there, kind of tight there, and I didn't want to push it really."

Vidro had surgery on his right knee last September, a procedure that ended his season. He has been on the disabled list with a badly sprained ankle, in which there is tendon damage, since May 5. He had intended to be ready to begin a rehabilitation assignment sometime next week, but the knee soreness will cause him to slow those plans.

Vidro took yesterday off, and intends to do the same today and possibly tomorrow, to rest the knee. He said his ankle feels fine.

"This is just a minor setback," he said. "I don't think it's going to be too big, because I was feeling good a couple days before. Even yesterday, when I started running the bases [and] taking groundballs, it was fine."

Tucker's Season Cut Short

Right-hander T.J. Tucker will have season-ending ligament replacement surgery on his right elbow Tuesday, leaving the Nationals' beat-up pitching staff down another member. The surgery will be performed by James Andrews in Birmingham, and Tucker likely won't be able to pitch again for a full calendar year.

"I'm not going to keep on going out there hurting the team," Tucker said. "I'll just sit here and rehab and cheer for these guys.". . .

Outfielder Ryan Church, who slammed hard into the outfield fence Wednesday at PNC Park in Pittsburgh while catching the final out of a 5-4 victory, was originally in last night's lineup against the Toronto Blue Jays, but sat out with a bruised left shoulder. X-rays of the shoulder were negative.