1960 when the Cowboys joined the league as an expansion team. During that year they were in separate conferences, but played once during the season. In 1961, Dallas was placed in the same division as the Redskins, and from that point on, they have played each other twice during every regular season. Texas oil tycoon Clint Murchison Jr. was having a difficult time bringing an NFL team to Dallas. In 1958, Murchison heard that George Preston Marshall, owner of the Washington Redskins, was eager to sell the team. Just as the sale was about to be finalized, Marshall called for a change in terms. Murchison was outraged and canceled the whole deal. Around this time, Marshall had a falling out with the Redskin band director, Barnee Breeskin. Breeskin had written the music for the team's fight song, now known as "Hail to the Commanders", which gets played by the Washington Commanders Marching Band after every touchdown at home games. He wanted revenge after the failed negotiations with Marshall. He approached Tom Webb, Murchison's lawyer, and sold the rights for $2,500 (). Murchison then decided to create his own team, with the support of NFL expansion committee chairman, George Halas. Halas decided to put the proposition of a Dallas franchise before the NFL owners, which needed to have unanimous approval in order to pass. The only owner against the proposal was George Preston Marshall. However, Marshall found out that Murchison owned the rights to Washington's fight song, so a deal was finally struck. If Marshall showed his approval of the Dallas franchise, Murchison would return the song. The Cowboys were then founded and began playing in 1960. At the time in 2016, a matchup between the teams on Thanksgiving was the most-watched regular-season game broadcast by the NFL on Fox. Philadelphia Eagles The Commanders' rivalry with the Philadelphia Eagles began October 21, 1934, during Washington's first year under the Boston Redskins moniker; the Redskins defeated the Eagles 6–0 at Fenway Park. Washington leads the series 87–80–8. The Eagles have won 12 of the last 20 matchups since 2010. New York Giants Players and staff Roster Staff Retired numbers Unofficially retired Some numbers are unofficially retired and are usually withheld from being selected by other players. The following numbers fall into that category. 7 Joe Theismann, QB, 1974–1985 28 Darrell Green, CB, 1983–2002 42 Charley Taylor, WR, 1964–1977 43 Larry Brown, RB,