Exciting Saints youngster Jack Steele has dislocated his knee at training on Thursday and has been ruled out of Saturday's clash with the Suns.

The tough midfielder had to be helped off the field by trainers after copping a knock in the tackle and will undergo scans in the coming days to determine the severity of the injury.

St Kilda's GM of football Simon Lethlean said a timeframe could be put on Steele's return after he has scans.

“We will know more once we have the results of the scans as to just how much footy he will miss,” Lethlean told the club website.

“It’s obviously a disappointing blow for Jack and for the team but hopefully it’s an injury that doesn’t keep him out for too long.”

“We have learnt this year that there is no benefit in being frustrated by injuries outside of our control. We will instead be focusing on who can step up through the midfield in Jack absence.”