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The San Francisco 49ers and defensive end Arik Armstead "are making significant headway on a multi-year extension," according to CBSSports.com's Jason La Canfora.
The 49ers have until 11:59 a.m. ET on Monday to extend the franchise or transition tag, so getting a deal hammered out with Armstead now would allow them to save the tag for another player or avoid it altogether.
This article will be updated to provide more information on this story as it becomes available.
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