Shane Mumford is not in a "great place" after three-year-old footage of the former ruckman snorting a white powder was made public.

Former Australian cricketer and GWS community liaison officer Gavin Robertson said Mumford was suffering after the revelation cast doubt on his potential AFL comeback with the Giants next season.

"He's made a mistake in life but he's not sitting back on a banana chair at home lapping life up. He's not in a great place and he's really upset with the choices that he's made," Robertson told Fox Sports.

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AAP