Collingwood ruck-forward Mason Cox has signed a fresh contract extension to remain at Olympic Park beyond 2023.

The Texan, whose current contract expires at the conclusion of this season, penned a two-year extension on Monday ahead of the Magpies' flag assault.

A key depth piece behind first-choice ruckman Darcy Cameron, the 32-year-old remains a critical contributor to coach Craig McRae's rampaging side.

The Magpies have also confirmed new deals for sharpshooter Ash Johnson and 2023 debutant Harvey Harrison, who are both now tied to the club until the end of 2025 as well.

“Harvey impressed over the pre-season which set himself up for more opportunity at AFL level this year," Graham Wright, via a club post. 

The triple re-signing comes a day after the club confirmed new deals for John Noble, Jakob Ryan and Beau McReery.

Cox and the first-placed Pies are preparing for a blockbuster clash with arch-rival Carlton at the MCG this Friday night.