DEMON leader Brent Moloney will again face a fitness test this week, before he can be declared right to play against Port Adelaide at AAMI Stadium on Sunday.

Moloney has missed the past four matches with a corked thigh and quadriceps injury, but remains a 50/50 chance to return for round 21.

Jack Grimes, who returned for Casey last round, will now miss the rest of the season after reinjuring his hamstring in the VFL.

Dynamo Aaron Davey (fractured fibula) is six to eight weeks away from resuming running after suffering his injury against Hawthorn at the MCG last Sunday.

Youngster Luke Tapscott, who did not play for Casey last round after copping a knock on the shoulder, is expected to return this weekend.

Second-year Demon Neville Jetta has torn cartilage in his shoulder and will have surgery on Wednesday.

Midfielder Jordon Gysberts (back) will not play again in 2010.

Ricky Petterd (shoulder), Stef Martin (hip), John Meesen (foot), Jake Spencer (back) and Max Gawn (knee) are sidelined for the rest of the season.

Round 21 injury update
Aaron Davey (leg) - season
Max Gawn (knee) - season
Jack Grimes (hamstring) - season
Jordan Gysberts (back) - season
Neville Jetta (shoulder) - season
Stef Martin (hip) - season
John Meesen (foot) - season
Brent Moloney (quadriceps) - test
Ricky Petterd (shoulder) - season
Jake Spencer (back) - season
Luke Tapscott - (shoulder) - test