David Boies, the attorney, of Dallas Cowboys owner Jerry Jones received a letter from the NFL yesterday, accusing Jones of "conduct detrimental to the league's best interests" stemming from his constant criticism and attempt to prevent the contract extension of NFL commissioner Roger Goodell.

RELATEDRoger Goodell Wants $50 Million, Private Jet From NFL: Report

The letter, which was first reported by The New York Times and The Wall Street Journal, states, "Your client's antics, whatever their motivation, are damaging the league and reflect conduct detrimental to the league's best interests," the letter said.

"Someone who is genuinely concerned 'that the owners know the truth about the negotiations' would not deliberately distribute such an outdated document, particularly when he has in his possession drafts that are current and accurately reflect the actual state of negotiations, or threaten to sue the league and its owners if he does not get his way," the letter said.

Jerry Jones hired attorney David Boies in an effort to prevent Goodell's contract extension earlier this month, according to the New York Times. Jones has also allegedly threatened to sue the league, as well as some team owners, if Goodell's extension is approved by the league's compensation committee.

The letter Boies received also confirmed that Jones was removed as a non-voting member of the compensation committee after threatening to sue.

The New York Times report alleges that during a conference call earlier this month, Jones informed the six owners on the compensation committee— those of the Chiefs, Falcons, Giants, Patriots, Steelers and Texans — that legal papers were drawn up and would be served this Friday if the committee did not scrap its current plans to extend Goodell’s contract. 

Per ESPN

"With due respect, we urge Mr. Jones to drop his misguided litigation threats and media campaign to undermine the committee's mandate," the letter said. "And we urge Mr. Jones to support the committee's deliberations, not attempt to sabotage them."

According to ESPN, Jones has issues with Goodell's compensation in the deal, along with concerns about the protests during the national anthem and how the league has handled them thus far. 

RELATEDEzekiel Elliott Not Eligible To Return Until December 24th

Dallas, 5-4, will host the 8-1 Philadelphia Eagles on Sunday Night Football this weekend.