Jarryn Geary will miss the next three weeks after injuring his calf against the West Coast Eagles.
The skipper sustained the injury during the third quarter of Saturday's clash and sat out the remainder of the match.
Nathan Brown (knee), Josh Bruce (back) and Nathan Freeman (shoulder) face tests as they push to make their return from injury.
Head Physiotherapist Andrew Wallis confirmed that the trio could be available for selection should they get through Thursday’s main session.
WATCH: Injury report
Darren Minchington (hip) will miss a further one to two weeks, while Blake Acres (groin), Sam Gilbert (thumb), Lewis Pierce (hamstring) and Jarryn Geary (calf) are expected to return after the bye.
Ben Long (foot), Dylan Roberton (heart) and Koby Stevens (concussion) will continue to be assessed as they recover from long-term injuries.
Injury update: Round 12
Head Physiotherapist Andrew Wallis takes a look through the current Saints injury list.