De Goey’s contract is reportedly worth $750,000 a season and had been agreed to some time ago, but has now been formally lodged with the league.
The 24-year old is still awaiting his court case for an indecent assault charge relating to an incident in 2015. His hearing was moved from October to April 22 next year.
Magpies list boss Ned Guy said the signature of Mihocek was a significant one for the club, who has been one of the best success stories from the rookie draft.
“Brody is such a bankable performer and popular team-mate. He fronts up to every contest, brings his team-mates into the game, has a nose for a goal and is team first,” Guy told the club website.
“Everyone at Collingwood has loved what he has been able to achieve by bringing as much as he has to the team and we’re really pleased he will be with us for at least another three seasons.”
Collingwood announced yesterday that Marcus Wagner and Nick Maxwell will replace outgoing GM of Football Geoff Walsh on an interim basis following his retirement last week.