St Kilda's Mitch Owens will miss this weekend's clash with Hawthorn, while forward Tim Membrey will be required to pass concussion protocols ahead of Saturday's fixture against Hawthorn.
Owens suffered a brutal head knock after falling into the knee of teammate Anthonyย Caminiti during the Saints' clash with GWS, before being stretchered off the field.
The 19-year-old key forward was able to return to the bench after the accident, but will nonetheless require a final concussion test before selection.
In just his second season Owens has made a big impact for Ross Lyon's side, kicking 13 goals and finding plenty of the ball.
Despite the knock, the 191cm forward may not miss any more game time after the Hawks bout.
"It was a pretty sickening hit," Acting General Manager of Football David Misson said.
"It was great to see Mitch up and about by the end of the game.
"He'll now undergo the standard concussion procedures and we'll just take it one step at a time as he recovers.
"Similarly, Tim Membrey will be required to get through the final stages of concussion protocols to be eligible to play this weekend."
Membrey was unavailable last week after a head knock in Round 9, but could return alongside Owens in a Saints forward line boost.