Fremantle have re-signed defenders Michael Johnson and Alex Silvagni until the end of the 2013 AFL season, while fellow backman Antoni Grover is tipped to go on for another year.

Johnson signed a two-year deal while Silvagni, who was already contracted until the end of next season, penned a one-year extension.

Grover, who at 31 is the oldest player on Fremantle's list, was one of the Dockers' most consistent performers this season and is expected to sign on for one more year.

But the Dockers axed Clayton Hinkley and Joel Houghton from their senior list, while rookies Tim Ruffles, Ben Bucovaz and Hamish Shepheard were also told their services are no longer required.

And with Rhys Palmer having signed on with Greater Western Sydney and midfielder Byron Schammer and veteran Roger Hayden already announcing their retirement, the Dockers will make at least eight changes to their list over the off-season.

Fremantle lost their last seven games of the season to finish a disappointing 11th with a 9-13 win-loss record.

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