The Boston Yanks reference article from the English Wikipedia on 24-Apr-2004
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Boston Yanks

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The Boston Yanks started play in the National Football League in 1944. They moved to New York City in 1949 and became the New York Bulldogs. In 1950, they changed their name to the New York Yanks. The team last played in 1951. The franchise is reported to have been 'sold back' to the league following the 1951 season, but it is more likely the franchise was revoked by the league, whereupon the team was resurrected as the Dallas Texans for 1952.