FREMANTLE free agent Zac Clarke is weighing up whether to extend his career with the Dockers or seek a fresh start at one of several rival clubs pursuing him.

Although Fremantle's season ended with last round's win over the Western Bulldogs, Clarke, who played 13 senior games in 2016, will play in Peel Thunder's WAFL elimination final against East Perth on Sunday. 

Clarke, 26, might not make a decision on his future until the Thunder's finals campaign is over, with the ruckman one of a number of Dockers keen to finish a difficult AFL season on a positive note in the WAFL.

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AFL.com.au understands most of Clarke's suitors are based in his home state of Victoria, but he has also attracted interest from two other clubs.

A key consideration for Clarke will be weighing up his likely standing in a rival club's pecking order compared to his situation at Fremantle, where the Dockers' longstanding No.1 ruckman Aaron Sandilands, 33, is contracted for another season. 

Clarke faces minor surgery at the end of this season, having carried knee problems through most of the year, but is confident this will help him regain the athleticism he showed in his strong first half of 2015. 

Meanwhile, veteran Adelaide midfielder Scott Thompson wants to play on for a 13th season at West Lakes in 2017 despite being linked to a move to Melbourne, where his former Crows teammate Simon Goodwin is poised to take over as senior coach.

Former Adelaide coach Graham Cornes told Adelaide radio station FIVEaa Thompson had been approached about playing for the Demons next season and then transitioning into a coaching role under Goodwin.

But it's believed Thompson's first preference is to continue with the Crows, with his manager due to speak with the club later this week.

In other contract/trade news:

AFL.com.au can confirm Levi Casboult has agreed to terms with Carlton on a new one-year deal.

- Gold Coast ruckman Tom Nicholls is expected to recommit to the Suns beyond 2016 soon.

-  Out-of-contract spearhead Ben Griffiths looks set to remain at Punt Road as his talks with Richmond progress positively.

- Adelaide free agent Ricky Henderson appears increasingly likely to play on with the Crows despite rival interest.

- Melbourne free agent Jack Grimes' future at the club remains up in the air and might not be resolved until Casey's VFL finals campaign is over.

- North Melbourne forward Aaron Black will explore his trade options this October, but remains open to serving out the final season of his existing deal with the Roos.