Broncos player receives hate mail after taking a knee

    Marshall looks on from the bench on September 8.

    Story highlights

    • Brandon Marshall posted the letter to Instagram
    • Teammates and fans are offering Marshall their support

    (CNN)An NFL player who knelt during the national anthem is receiving an outpouring of support from his fans and teammates after he received a letter filled with racist and threatening language.

    Denver Broncos linebacker Brandon Marshall posted the handwritten letter Friday on his Instagram page. (Warning: Link includes graphic language.)
      The letter, which includes profanity, numerous mentions of the N-word and other racial slurs, threatens Marshall by saying "Your time is coming, watch out n*****!"
      The threat continues on the back of the letter: "We are 'channeling' a devastating hit for you!! Something to make you an invalid in a wheelchair!!"
      Marshall joined Colin Kaepernick and others in protest during Denver's season opener September 8 by taking a knee during the national anthem.
      The letter appeared to address the protests directly, saying "If you are sooo unhappy with America, turn in your 'millions' and move back to the jungle!"

      Disguised as fan mail

      Marshall said on Instagram that he received the letter at work. A Broncos spokesperson said Marshall brought the letter to the team's attention a few weeks ago and that the security department is currently looking into it.