Members of the Dallas Cowboys link arms and kneel during the National Anthem before the start of the NFL game against the Arizona Cardinals at the University of Phoenix Stadium on September 25, 2017 in Glendale, Arizona.
Jones is a supporter of President Donald Trump, who has been a vocal critic of the national anthem protests.
The filing to the National Labor Relations Board, according to ESPN, states that "the employer, evidenced by repeated public statements, is attempting to threaten, coerce and intimidate all Dallas Cowboys players on the roster in order to prevent them from exercising concerted activity protected under the act by saying that he will fire any players involved in such concerted activity".
Earlier Sunday, Vice President Mike Pence left an Indianapolis Colts game in protest after about a dozen San Francisco players kneeled during the anthem.
The NAACP's statement specifically cited Vice President Pence's decision to leave a Colts game as a reason why it believes "the National Football League has an obligation to take a strong stance on behalf of its athletes and their rights".
"There's nothing that I've seen that shows the union that did file the [unfair labor practice] has any connection with the NFL Players Association, the NFL, or any particular player".More news: Children set alight at nursery school in Brazil
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Trump is on Twitter offering a "big salute" to Jones, who Trump says "will BENCH players who disrespect our Flag".
BC-FBN-NFL Protests-Benched for Kneeling, 1101 Legal experts split on if NFL can punish for anthem protestsAP Photo NAS115, TXEG101, OHJM101, CACC101, FLLAU211, NY150, NY184, NY199Eds: With AP Photos.
"This is a workplace issue", Jones said.
"If the government pays for the patriotic display and the firing is a result of the behavior being deemed insufficiently patriotic, it is conceivable that that a claim could then be articulated", said Floyd Abrams, a First Amendment attorney in NY. "We're going to respect the flag, and I'm going to create the perception of it". I know in the modern age people think workers shouldn't have rights, but they still do.