Leyton Orient have injury worries over Ben Chorley, Jimmy Smith and Alex Revell ahead of the trip to Exeter.
Centre-half Chorley has missed the last four matches with a thigh problem and is doubtful along with midfielder Smith, who sat out Tuesday night's draw against Carlisle with a knee injury.
Striker Revell will miss the trip and could struggle to play again this season due to knee ligament damage.
But defender Adam Barrett has extended his loan spell from Crystal Palace until the end of the season and should keep his place at the back.
The Os are three points off the play-offs with five matches remaining but have won only once in their last seven outings.