ONE-GAME Sydney ruckman Darcy Cameron seems certain to request a trade at season's end, with three rival clubs in the hunt for his services.

The 23-year-old, who stands 205cm, finished runner-up in the 2018 NEAFL most valuable player award, but his sole AFL appearance was in round 18 last year.

Part of Cameron's appeal is his ability to also be a serviceable forward when he's not in the ruck.

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Greater Western Sydney has long been the clubhouse leader for Cameron, but Carlton and North Melbourne are muscling their way into the contest with the carrot of him becoming their No.1 ruckman.

He is close with GWS forward Zac Langdon, and also has a friendship with Blues co-captain Patrick Cripps and former Swan Nic Newman.

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The Giants plucked Shane Mumford out of retirement to lead their otherwise youthful ruck division this season, while the Kangaroos face the prospect of free agent Todd Goldstein departing.

St Kilda and Essendon are potential landing points for Goldstein, with North putting off discussions about his future until a new coach is hired. 

The 2015 All Australian is one of the Roos' highest-paid players and he would almost certainly have to take a pay cut to stay at Arden St.

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Matthew Kreuzer remains Carlton's first-choice ruckman and is still performing well, but is injury prone and on the wrong side of 30.

Cameron was already stuck behind Callum Sinclair and injured ruckman Sam Naismith before Sydney recruited South Adelaide big man Michael Knoll in last month's Mid-Season Rookie Draft.

Usual defender Aliir Aliir was even preferred in the ruck over him at times last year.

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Originally drafted from WAFL club Claremont three years ago, Cameron signed a one-year contract extension in early 2017, tying him to the Swans until the end of this season.

A trade deal will need to be reached for him to switch clubs, unless Sydney elects to delist him.

The annual ruck merry-go-round is in full swing, with the Saints keeping their options open to support emerging big man Rowan Marshall.

Goldstein, Port Adelaide's Paddy Ryder and even injured Bomber Sam Draper, who suffered an ACL tear in May, are all understood to be on St Kilda's radar.