WASHINGTON -- Left-hander Matt Chico, on the disabled list because of elbow reconstruction, was spotted in the Nationals' clubhouse on Tuesday.

He will have a bullpen session on Wednesday and then join Double-A Harrisburg to continue his rehab assignment on Friday. Chico has already pitched three games for Class A Hagerstown this season, giving up three runs in 11 innings.

There is no timetable as to when Chico will return to the Major Leagues. Chico hasn't pitched in a game for the Nationals since May 21, 2008.

"It's just nice to be in a uniform again," Chico said. "Down in Hagerstown, I was sitting around 88, 90 [mph]. I feel like I'm starting to get back to what I used to do -- being able to locate my pitches better."

Chico was the Nationals' best pitcher in 2007, going 7-9 with a 4.63 ERA.