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Raiders head coach Josh McDaniels said Friday that Garoppolo remains in the NFL's concussion protocol, Vic Tafur of The Athletic reports.

Garoppolo, who was a limited practice participant Thursday, is slated to take part in Friday's session, after which the Raiders should have a better idea of the quarterback's chances of playing Sunday against the Chargers. If Garoppolo is unavailable this weekend, either 37-year-old Brian Hoyer and rookie Aidan O'Connell would step in as the team's starting quarterback.

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