Washington Nationals right fielder Jose Guillen sat out last night's game against the Los Angeles Dodgers because of increasing problems with his left shoulder, the injury that has nagged him since he originally hurt it on June 26.

"It's really banged up," Guillen said prior to the game. "I don't know what to tell you. I've just got to learn how to shut it down when it's really sore. Sometimes, I think like I'm Superman. But it's really sore. It's really, really, really sore."

Guillen, hitting .299 with a team-high 19 homers and 58 RBI, could not say how long he would be out. Asked whether Guillen could play tonight against the San Diego Padres, Manager Frank Robinson said, "We'll see."

There is serious concern, though, that the injury could affect Guillen for the rest of the season, and that he could miss significant time. Earlier this week, Guillen said he would think about coming up with a new routine next season that would allow him to take time off more regularly and better prepare him for the long season. Yesterday, he said the injury is preventing him from driving the ball.

"When was the last time I hit a deep fly ball?" Guillen asked. "I don't know."

Guillen entered last night with a seven-game hitting streak, but he had only one extra-base hit, a double, in that time. Team physician Bruce Thomas said afterward that Guillen lifted weights during the game, and he felt like it loosened up.

"It was encouraging," Thomas said.

Long-Term Plans in Viera

The Nationals are expected to announce that they have locked in to their spring training complex in Viera, Fla., for more than 10 years. The Nationals will continue to lease the main field at Space Coast Stadium, where they play their exhibition games, and will own the auxiliary fields just down the road. The facility was originally constructed for the Florida Marlins, but was traded to the Montreal Expos as part of the deal that made Major League Baseball the Expos' owner. . . . Catcher Brian Schneider missed his second straight game with tendinitis in his right shoulder.