Collingwood ruckman Mason Cox under AFL investigation for pushing GWS Giants ruck coach Shane Mumford in a pre-match stunt.

Collingwood ruckman Mason Cox is under investigation by the AFL for pushing GWS Giants ruck coach Shane Mumford in a "bizarre" pre-match stunt. Cox ran onto the Giants' warm-up area during a ball-up drill, pushing Mumford from behind and taking the ball before running away. The AFL has issued Collingwood a "please explain" regarding Cox's actions, which added to the growing rivalry between the two clubs.