MELBOURNE, VICTORIA - JUNE 25: Paddy McCartin of the Saints is congratulated by Jack Steven, Sebastian Ross and Nick Riewoldt of the Saints after kicking a goal during the round 14 AFL match between the St Kilda Saints and the Geelong Cats at Etihad Stadium on June 25, 2016 in Melbourne, Australia. (Photo by Scott Barbour/AFL Media/Getty Images)

St Kilda has ruled out young forward Paddy McCartin for at least another week due to the effects of several head knocks this season.

McCartin missed last week's win over Essendon after suffering his third concussion of the season in Round 15 against the Suns.

GOLD COAST, AUSTRALIA - JULY 02:  Paddy McCartin of the saints during the round 15 AFL match between the Gold Coast Suns and the St Kilda Saints at Metricon Stadium on July 2, 2016 in Gold Coast, Australia.  (Photo by Jason O'Brien/Getty Images)
GOLD COAST, AUSTRALIA - JULY 02: Paddy McCartin of the saints during the round 15 AFL match between the Gold Coast Suns and the St Kilda Saints at Metricon Stadium on July 2, 2016 in Gold Coast, Australia. (Photo by Jason O'Brien/Getty Images)

St Kilda general manager of football Jamie Cox told the club's website that it still remains to be seen when McCartin will return to football.

“Paddy’s been ruled out for this week,” Cox said.

“There are some more tests and conversations that Paddy’s got to have before we really know when he’ll be fully available to return.”

Meanwhile, defender Sam Fisher (hamstring) and midfielder Tom Curren (quad) will both miss at least another week due to their respective injuries, while Shane Savage must pass a concussion test being being cleared to play this week.

MELBOURNE, AUSTRALIA - MAY 28:  Shane Savage of the Saints marks the ball during the round 10 AFL match between the St Kilda Saints and the Fremantle Dockers at Etihad Stadium on May 28, 2016 in Melbourne, Australia.  (Photo by Darrian Traynor/Getty Images)
MELBOURNE, AUSTRALIA - MAY 28: Shane Savage of the Saints marks the ball during the round 10 AFL match between the St Kilda Saints and the Fremantle Dockers at Etihad Stadium on May 28, 2016 in Melbourne, Australia. (Photo by Darrian Traynor/Getty Images)

St Kilda face Melbourne at Etihad Stadium on Sunday afternoon.