Fremantle forward Cam McCarthy has been hospitalised after collapsing at training on Wednesday, the club announced.
Fremantle general manager of football Peter Ball said the 25-year old would undergo further testing to determine the cause of the incident.
“Cam was training really well with a small group of teammates in a non-contact session this morning when he suddenly collapsed on the ground,” Bell said in a statement on fremantlefc.com.au.
“He was immediately assessed by our medical staff and an ambulance was called.
“Cam was subsequently admitted to hospital, where he is undergoing further assessment and tests to determine the possible cause of the collapse and what treatment will be required.
“We will be in a position to comment further in due course.
“In the meantime, we will ensure that Cam and his family are provided with all the necessary care and support required.”
McCarthy has played 69 senior games after getting drafted by GWS with pick 14 in the 2013 AFL draft.
He moved from the Giants to Fremantle at the end of the 2016 season.