GREATER Western Sydney has upped its offer to Jye Caldwell in a bid to ward off Victorian rivals from snaring the talented midfielder.

The Giants are believed to have lifted their original two-year offer to a deal up to four years as Caldwell weighs up his future.

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The club is understood to be growing in optimism he will knock back interest from his home state and remain at the Giants.

St Kilda has been among the clubs keen on the 20-year-old, who played nine games this season in his second year at the club. The Giants are desperate to keep him after he joined them with pick No.11 in the 2018 NAB AFL Draft.

He is one of three first-round picks from that draft group who are unsigned beyond this year, alongside Jackson Hately and Xavier O'Halloran. Hately has been strongly linked with a move back to South Australia and is considering a move, while O'Halloran also has interested clubs in Victoria.

The Giants have already had an eventful end to the season after dropping out of the finals, with Zac Williams following Aidan Corr in departing as a free agent.

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Williams is headed for Carlton while Corr is expected to join North Melbourne with both on multi-year lucrative deals. The Giants will get compensation picks in return for their departures.

The Giants also re-signed important midfielder Harry Perryman to a new two-year deal last week.

However star forward Jeremy Cameron remains out of contract after a disappointing season that saw last year's Coleman medallist kick 24 goals in 17 games.

Rebounding defender Isaac Cumming is also out of contract but a new deal is expected for the highly rated backman who managed just three games this season due to a serious hamstring injury. 

It has been a big week for the Giants' list management team, with veteran defender Heath Shaw not offered a new deal while, as AFL.com.au reported last week, a decision needs to be made on ruckman Shane Mumford who is leaning towards another season with the club.