Sources - Seattle Seahawks releasing veteran Chris Carson; RB plans to retire from NFL due to neck injury - ESPN
Chris Carson: Seahawks agree two-year deal to keep running back in Seattle, NFL News
Seahawks RB Chris Carson retires with lingering neck injury – NBC Sports Bay Area & California
Chris Carson's Seahawks legacy: Punishing rusher, but injuries took their toll - The Athletic
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Seattle Seahawks running back Chris Carson retiring from NFL due to neck injury
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