ST KILDA has been dealt another injury blow with midfielder Jack Steven sidelined with a thigh injury.

It is expected Steven will miss up to four weeks and could return as early as round 20 against the Western Bulldogs.

The injury presents an opportunity for a younger player to make their way into the side.

"Jack has experienced some leg soreness in recent weeks which our medical team feels is best treated through rest and rehabilitation, " said Head of Football, Chris Pelchen.

"While the injury provides him with some frustration to an already interrupted season, we are confident that he will return to the AFL team before the end of 2014."

The news has come as midfielder Jarryn Geary was given a return-to-play date and will be available for selection in six weeks.

Click here for the full injury list.