North Melbourne key defender Robbie Tarrant is undergoing scans on his AC joint after copping a knock during the Kangaroos' intra-club game at Arden Street on Wednesday morning.

The extent of the injury to the 29-year-old is unclear at this stage with the club expected to know more later on Wednesday afternoon.

Tarrant has been selected to play in the AFLX competition that lost Hawthorn's Chad Wingard, Port Adelaide's Robbie Gray and Fremantle's Joel Hamling within the past 24 hours as they stuggle to overcome minor injuries.

The competitive hitout saw running defender Sam Wright involved in a heavy collision with key forward Nick Larkey in a marking contest.

Both players hit the ground hard with Wright dislocating his finger in the incident and Larkey appearing concussed as he left the ground. Larkey did not reappear.

Several Kangaroos players sat out the game with Jack Ziebell, Jasper Pittard and Mason Wood all overcoming niggling calf injuries while Todd Goldstein was missing for personal reasons.