Josh Koroma is the latest star to be sidelined after sustaining a hamstring injury over the weekend.
He could miss up to a month, Orient have confirmed, as the Brisbane Road treatment room continues to fill up.
A statement read: “The club can confirm forward Josh Koroma has picked up a grade two hamstring injury and is likely to miss three to four weeks of action.
“The 20-year-old, who has scored nine goals this season, picked up the injury in Saturday's 3-0 win over Maidstone United.
“We wish Josh a quick recovery!”
Despite their issues, Saturday’s win over the Stones means the East Londoners are three points clear at the top.