The 31-year old centre-back has been out of action since April 11 and is a chance to come back for the Empire Field fixture with the bottom side in the Western Conference.
'Caps coach Teitur Thordarson has used the same back four for the past few games and indicated that he would go again with that formation although he did confirm that DeMerit would be involved in some capacity.
"It's very important to have a back line that works together all the time, and that was the main reason that I didn't want to make a change," said Thordarson. "Even though those players have played three or four games in a row and clearly are tired, when they get the chemistry and get things working they make less mistakes and that is important.
"He trained in Vancouver while we were away and he trained today so as long as there are no setbacks, he will most probably be in the 18 for tomorrow's game."