Emerging defender Tom Stewart has been ruled out for the rest of the match after an accidental head knock in the second quarter.
Stewart flew for a mark from behind and clashed heads with Fremantle’s Hayden Crozier going back with the flight.
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He remained on the ground before being helped off by trainers.
Stewart went down into the rooms after the incident.
The 24-year old was one of Geelong's best performers before succumbing to injury, claiming 10 disposals across half-back.
The injury follows captain Joel Selwood’s concussion in the opening minutes which ended his day just after it begun.