LOS ANGELES -- Nationals center fielder Denard Span is back on the field and he is doing some throwing, running and light swinging. According to manager Matt Williams, the team is proceeding with caution.
The reason for that is Span had a minor setback last week. He dealt with back tightness after taking batting practice and performing outfield drills. He had the rest of Thursday and all of Friday off. However, Span was able to run sprints and play catch Saturday.
There is still no timetable as to when Span will play a Major League game. Span has been out since early July because of back tightness and weak abdominal muscles.
• David Carpenter, who hasn't pitched since June 5 because of shoulder inflammation, is throwing on flat ground and could have a bullpen session soon, according to Williams.
Bill Ladson is a reporter for MLB.com and writes an MLBlog, All Nats All the Time. He also can be found on Twitter @WashingNats. This story was not subject to the approval of Major League Baseball or its clubs.