Per Redskins beat writers John Keim and John Campbell, HC Mike Shanahan said that WR Santana Moss is in "excellent" shape and is 15 lbs. lighter, and that it's highly unlikely Pierre Garcon will play in the slot. Josh Morgan and Leonard Hankerson are stronger candidates to play there.
Moss can also play in the slot, but it's not clear what his role will be with the emphasis that the Redskins placed on the receiver position this offseason. Garcon appears to be the only sure bet for playing time at this point.