ST KILDA continues to lock away its players with defenders Dylan Roberton and Cameron Shenton the latest to sign contract extensions with the club.

Six months on from the 'Saints Future Fest' initiative that saw 19 players recommit, Roberton has signed up until at least the end of 2017.

The former Docker, who turns 24 on Sunday, has been in strong form this season after putting together a full summer of training.

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A pre-season ankle injury hampered his second season as a Saint last year and he struggled to hold his spot in the side. But after increasing his body size over summer, Roberton has developed a harder edge to his playing style as well as providing the team with an alternate key defensive option.

He is expected to line up in the Saints' clash with the Western Bulldogs on June 27 following the club's bye, after missing their win over Melbourne on Sunday with a foot issue.

Shenton, 24, who was upgraded to the senior list this season after three years as a rookie, has inked a one-year extension that takes him through until the end of 2016.

The running half-back played 13 games last year and has added nine to his tally so far this season.

Saints coach Alan Richardson said the pair's new deals would help the Saints shore up their on-field stocks.

"Dylan and Cameron have continued the positive momentum around our players committing to the club's future – they are confident that we are heading in the right direction and want to be part of that," he said.

"This follows on from Jack Steven committing to a five-year deal at the start of the year and our Saints Future Fest campaign last year under which saw 19 of our young players put pen to paper."

The two signatures come after the Saints secured Jack Steven for five years in March this year, and the likes of Luke Dunstan, Seb Ross, Jack Billings, Josh Bruce and Blake Acres confirmed extensions in the re-signing blitz last October.