After a luckless run with injuries at Melbourne, Hore was not offered a new contract for the 2022 season, concluding a 14-game, three-year spell with the Demons.
The 25-year-old had shown plenty of promise in the red and blue two years ago, playing a key role for Melbourne's defence in his maiden campaign at AFL level before suffering collarbone and quad injuries.
Hore averaged 15.6 disposals, 4.9 marks and 4.2 rebounds 50s across the course of the 2019 season.
An ACL injury then ended Hore's hopes of returning to the Demons' lineup for 2021, suffering the setback during pre-season training in January.
The former Collingwood VFL representative now firms as a chance to join a second AFL club, with the Kangaroos inviting the medium-sized defender to train at Arden Street this pre-season, according to The Age's Michael Gleeson.
The Kangaroos have enjoyed an active off-season, adding Suns midfielder Hugh Greenwood, Tigers tall Calum Coleman-Jones and No.1 Pick Jason Horne-Francis to their list, however their defensive depths have been hindered with the departure of veteran Robbie Tarrant to Richmond.
North Melbourne currently have two list spots free for 2022, with former Crows forward Tom Lynch also in line to join the Shinboners.
Lynch was delisted by Adelaide this off-season and is set to take on a coaching role with the club for next year, with the position also likely to see the 31-year-old feature on-field.
Carlton, Essendon and Gold Coast are among the clubs already offering train and trial invitations to overlooked prospects and former AFL players for 2022.
The Pre-Season Supplemental Selection Period is set to open on January 10 and will close on March 9.
Clubs will also be able to leave list spots open for the Mid-Season Rookie Draft on June 1.