Luckless St Kilda key defender Matt Maguire has been ruled out for the remainder of the AFL season after breaking his foot.

Maguire, 23, suffered the injury during Saturday's narrow win over Richmond.

He was initially expected to only be sidelined for a few weeks.

But the Saints confirmed on Monday that Maguire had fractured the fourth metatarsal, ending his season.

Maguire also missed 11 matches last year with a serious injury to his other foot and also suffered hamstring problems early in 2008.

The three-point victory over the Tigers came at a heavy cost for the Saints.

Skipper Nick Riewoldt will miss 3-4 weeks with a strained medial ligament in his knee, while forward Xavier Clarke is out for three weeks with a hamstring strain.

Fullback Max Hudghton was a late withdrawal against the Tigers and is also likely to miss St Kilda's next two games with a hamstring injury.

But tagger Steven Baker is likely to be fit to take on Collingwood after the bye weekend for the Hall of Fame match after jarring his knee against Richmond at Telstra Dome.

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