The AFL confirms Carlton player Lachlan Cowan has been found guilty of conduct unbecoming and suspended for two matches following an investigation into his use of an illicit substance last weekend and the circumstances in which the matter subsequently became public.

The Carlton Football Club investigated the matter and subsequently provided information to the AFL, which conducted further enquiries.

Cowan has been suspended for the first two home and away matches of 2027 and issued a $5000 suspended fine.

The matter will also constitute a notifiable adverse finding under the AFL's Illicit Drugs Policy.

Cowan will be required to undertake further education above the current mandated training on illicit substances and their effects.

"AFL Players have a responsibility to themselves and their professional careers to uphold community expectations. They are well-educated when it comes to the harms associated with the use of illicit substances. Lachlan admitted his mistake and understands he must be accountable for his actions," AFL COO Tom Harley said.

The AFL's new illicit drugs policy will come into effect in January 2027 after education sessions with every club and player across November and December.

All players will be hair tested upon their return to training in January, with readings going as far back as three to six months prior.