Former Collingwood big man Mason Cox has officially signed with Fremantle as a Supplemental Selection Period acquisition.
Cox joins the Dockers on a two-year deal after more than a decade with Collingwood, where he joined from the United States as a trail-blazing addition to the AFL.
The 211cm ruck-forward hybrid debuted for the Magpies on Anzac Day in 2016 and would go on to play 139 games for the Victorian club.
Cox featured in Collingwood’s 2023 premiership side, playing 19 games that year under coach Craig McRae.
After losing supporting ruckman Liam Reidy to Carlton during the trade period, Fremantle have moved for an experienced third-string option in Cox for the next two seasons.
“We see a real benefit with having a 211cm premiership ruck of the calibre of Mason Cox joining our program,” Dockers list lead David Walls said.
“We are really pleased with our ruck combination of Sean Darcy and Luke Jackson and see Mason adding to our depth in that department. His knowledge and experience will be really valuable.
BRISBANE, AUSTRALIA – APRIL 17: Sam Day of the Lions and Mason Cox of the Magpies compete for the ball during the 2025 AFL Round 06 match between the Brisbane Lions and the Collingwood Magpies at The Gabba on April 17, 2025 in Brisbane, Australia. (Photo by Russell Freeman/AFL Photos via Getty Images)
“We have 19-year-old Aiden Riddle developing nicely, and he will benefit greatly, along with Luke and Sean.
“We look forward to welcoming Mason to the Club.”
The signing of Cox comes after a trade and draft window that saw the Dockers add Judd McVee from the Melbourne Demons before selecting Adam Sweid, Tobyn Murray and Leon Kickett.
Fremantle also listed NGA pair Toby Whan and Ryda Luke as category B rookies following last week’s draft.
The Dockers now have one rookie list spot remaining for the 2026 season.
