Patrick McKenna has suffered a setback with the young defender to be sidelined for up to two months with a serious hamstring injury.
He suffered the hamstring injury while playing for Casey in a VFL practice match against Box Hill and it was originally thought he may have been out for longer.
"We thought it was a pretty serious one, potentially requiring surgery, but he consulted the surgeon last night (Monday), who felt that conservative rehab was the way to go," Melbourne's elite performance manager David Misson said.
"He'll probably be six to eight weeks, I reckon."