Kearns injured her AC joint in a tackle.

IRISH Cat Rachel Kearns is set miss the remainder of the AFLW season after injuring her shoulder during Geelong's season-opening win over Richmond.

Kearns was forced from the field in significant pain during the first quarter of the clash following a heavy tackle from Richmond's Beth Lynch.

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"Rachel underwent surgical repair of her AC Joint this morning," Head AFLW Physiotherapist Erin Nelson says.

"This will most likely be a season ending injury."

It's a tough blow for Kearns, who played every game in her debut season earlier this year and earned respect for her speed and ferocious tackling.