AFL legend Leigh Matthews has lashed "bozos" at league headquarters and added his voice to growing calls for a week off before the grand final in the wake of Tom Stewart's heartbreaking concussion.

Geelong star Stewart will miss the season decider after he was concussed in the first quarter of Friday night's 30-point win over Hawthorn in the qualifying final.

The 32-year-old utility was hurt in a tackle from Hawthorn's Mabior Chol and has entered concussion protocols, ruling him out of action for at least 12 days.

New AFL football boss Greg Swann has already flagged the likelihood of the pre-finals bye - introduced in 2016 - being switched to the week before the grand final.

But Matthews said the fact the change had not already been made years ago was an example of the AFL operating as

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