The San Francisco 49ers could be getting another weapon back at the perfect time, as the undefeated team continues to navigate a growing list of injuries.

According to ESPN's Adam Schefter, the 49ers have opened the practice window for wide receiver Christian Kirk, who has spent the entire season on injured reserve with a calf injury. The move gives Kirk an opportunity to return to practice as San Francisco works toward getting him back on the field.

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This story will be updated.