North Melbourne is set to be boosted by the return of star midfielder Tarryn Thomas for Sunday's clash with Geelong at Blundstone Arena.

Thomas suffered internal bruising after a kick to the ribs against West Coast in Round 2 and was initially slated to miss up to eight weeks.

General Manager of Football Performance Dan McPherson said Thomas was just waiting on specialist clearance before making his comeback.

"'Taz' has had a couple of good weeks training, he went back and had a scan yesterday ... he's just got to wait and get tick-off from the specialist but the medical guys are pretty confident that he'll be right to play this weekend," McPherson said.

The Roos are also set to regain forward Cam Zurhaar who has been "symptom-free" since his Round 4 concussion against Sydney, while Jack Mahony has pulled up "remarkably well" despite suffering an ankle injury in the Good Friday SuperClash and is expected to be available for selection.

The news isn't as good for defender Aaron Hall who went down against the Western Bulldogs with a hamstring injury.

"It's a reasonably significant injury, so we expect he'll probably be a month away before he returns," McPherson said.

"Hopefully we'll be able to get him moving late this week or early next week, but it's probably three or four weeks before he returns to play."

Jed Anderson played his first match of the season in North's VFL win over Footscray, but the club will take a cautious approach with him this weekend due to a sore hamstring.

"He played about 80 per cent game time, went really well, but then has pulled up quite sore in one of his hamstrings," McPherson said.

"If it was a final we'd probably play him, but we'll probably take the cautious approach given he's had an interrupted pre-season. He probably won't play this week but we fully expect he'll play next week."

>> Click here for full injury list, thanks to AIA Vitality