Luke Kuechly retires from NFL at age 28 - The Washington Post
Some NFL Players Think Luke Kuechly Should Retire After Concussion
Luke Kuechly Retires from NFL at 28
Luke Kuechly retires from football at age 28 - Vicksburg Daily News
Luke Kuechly retires, Carolina Panthers linebacker ends career - Sports Illustrated
Panthers officially place Luke Kuechly on reserve/retired list
Why did Luke Kuechly retire? Panthers star explains his decision to end NFL career
NFL Player Luke Kuechly Announces Retirement at 28
Carolina Panthers linebacker Luke Kuechly retiring from NFL