The investigation comes as AFL club doctors push for players to be able to make voluntary acknowledgements of the risks of taking the field when their future is clouded by repeated head injuries.

The player at the centre of an AFL club’s secret concussion deal has been revealed as Geelong’s Jake Kolodjashnij.

Craig Drummond, who was Geelong’s president when the deal was signed, says he won’t be involved in any future deliberations by the AFL over the deal.