Key forward Peter Wright will undergo surgery next week after dislocating his shoulder at training yesterday.
Wright had a scan on Friday afternoon and the decision has been made to have surgery immediately.
The key forward is expected to miss the first half of the season.
General Manager of Performance Daniel McPherson said the club will take a conservative approach with his recovery.
“We’re really disappointed for Pete. He has had a terrific pre-season, and was in great shape leading into Sunday,” McPherson said.
“The results of yesterday’s scan indicate surgery is required to properly repair the injury.
“Pete is an incredibly important part of our future, so we’ll take the necessary time to get this right, and we’ll look forward to welcoming him back into the team in the second half of the season.” McPherson said.
Essendon will provide updates as he progresses with his rehab.