Nationals center fielder Denard Span will likely go on the 15-day disabled list because of back spasms, according to a baseball source familiar with the situation. The Nationals have not confirmed that Span is going on the DL. Span has been dealing with back spasms since June 7 against the Cubs. There were times he would feel better, play a few games and then the back spasms would reoccur. Span went to Dallas on Thursday to get his back checked.