Denard Span (concussion) went 1-for-2 with a walk in a minor league rehab game with Low-A Hagerstown on Friday.
Mark Zuckerman on Twitter
Assuming he feels well enough afterwards, he'll be activated from the disabled list and is expected to rejoin the Nationals starting lineup on Saturday. The 30-year-old got off to a slow start with the bat, slashing .222/.300/.361 with four RBI in his first 10 games.
Jordy Mercer was removed from Friday's game against the Brewers in the fourth inning due to an ankle injury.
Rob Biertempfel on Twitter
Mercer sustained the injury earlier in the game when he was spiked while trying to turn a double play at second base. No word yet on the extent of the injury or how much time he may miss. Clint Barmes replaced him at shortstop.