Ben Chorley is out of Leyton Orient's trip to Peterborough.
The defender, who has been captaining the Os in Stephen Dawson's absence, is suspended after collecting his fifth booking of the season on Saturday.
Aaron Brown is likely to step in at centre-half alongside Terrell Forbes.
Dawson is expected to be out for at least another couple of weeks with a leg injury and fellow midfielder Adam Chambers is still recovering from surgery on his calves.
Jonathan Tehoue is pushing for his first start in the league this season after his late heroics at the weekend.
Orient were 2-0 down against Bournemouth when the French striker climbed off the bench to score twice in the last five minutes to secure an unlikely point.