The list shift has forced Crowden to the outer, with Fremantle confirming on Friday night that the 23-year-old would not be offered a contract.
“These are always difficult conversations to have,” Fremantle's Head of Player Personnel David Walls said in a club statement.
“Mitch was disappointed but took the news in a manner reflective of his positive attitude during his time at Freo.
“We wish Mitch all the best in his future endeavours.
“We will do all we can to assist Mitch and his management in finding new opportunities for him.”
Crowden was delisted by Fremantle 12 months ago before being re-listed through the Rookie Draft.
He added two games to his career tally this year, seeing his five-season stint in purple end after 42 matches.
Crowden joins the aforementioned Blakely and Western, Blake Acres (Carlton), Rory Lobb (Western Bulldogs), Griffin Logue (North Melbourne), Darcy Tucker (North Melbourne), Lloyd Meek (Hawthorn) and David Mundy (retired) in departing Fremantle.