Scully has missed the past two matches with a knee injury and has played just six games this year, due to his knee issue.
The Demons have also lost rookie Michael Evans for the rest of the season with a back injury.
Evans suffered from back soreness following a recent training session.
Scans later revealed a stress fracture in his back.
He will now require a period of rest and rehabilitation.
Rohan Bail (knee) will miss a further week, while Michael Newton (foot) is still two matches away.
Jack Grimes (foot) and Jake Spencer (knee) are out for the rest of 2011.
Round 20 injury List
Rohan Bail (knee) - 1 week
Michael Evans (back) - season
Jack Grimes (foot) - season
Michael Newton (foot) - 2 weeks
Tom Scully (knee) - test
Jake Spencer (knee) - season
