Fremantle defender Luke Ryan has put pen to paper on a contract extension that will see him remain at the club until at least the end of the 2023 season.

Ryan had a year to run on his current deal, but agreed to a three-year extension on Tuesday.

Ryan will also change numbers ahead of the new season, and will now wear number 13, following 49 games in the number 38.

The 23-year-old was taken with pick 66 in the 2016 draft, and said if it wasn't for the Dockers, he may not even be in the AFL.

โ€œIโ€™m very excited to stay with Fremantle,โ€ Ryan told the club's website.

โ€œIโ€™ve got my family back home but when I spoke to them, we came to the conclusion that Fremantle gave me my chance - if it wasnโ€™t for Fremantle I probably wouldnโ€™t have been playing AFL.

โ€œ(Before) I was called out with pick 66, I felt it was my last chance and, luckily enough, they called me. I owe it to Fremantle and what theyโ€™ve done for me, so I wanted to sign on.โ€

Ryan had to step up in the absence of Alex Pearce last season, and impressed averaging 20.4 disposals, 5.2 marks and 5.1 rebound 50s per game.

โ€œLukeโ€™s re-signing is a fantastic result, heโ€™s someone who has cemented himself in our back six,โ€ Fremantle's list manager Mark Micallef told the club's website.

โ€œWith Lukeโ€™s intercept ability and ability to use the ball by foot, he adds to the defensive pillars we have in our defence.

โ€œWe see Luke as being a really strong and hopefully elite player of the competition. He has the football characteristics that are vital for our success and we hope he can lock in that role as a strong leader of our defence.โ€