In 1925, the NFL was in need of a franchise in a large city that could be used to showcase the league. NFL President Joseph Carr traveled to New York to offer boxing promoter Billy Gibson a franchise. Gibson had owned the New York Brickley Giants, the NFL's last attempt to put a team in New York. While Gibson turned the offer down, he referred Carr to his friend Tim Mara. While Mara did not know much about football, Mara's friend, Dr. Harry March, did. March, a former physician for the Canton Bulldogs of the pre-NFL "Ohio League" and the future author of the first professional football history book Pro Football: Its Ups and Downs, soon became the club's first secretary.

This backing led Mara to purchase the NFL franchise for New York at a cost of $500–about $7,426.99 in 2020. Mara and March even signed Jim Thorpe to play several half games in order to boost attendance. However many of the New York sports fans still took to college football and stayed away from the pro sport. During the Giants' first season, attendance was so poor that Mara lost over $40,000. To tap into New York's college football fans, Mara tried to sign ex-college football superstar Red Grange only to find that he already was a member of the Chicago Bears. However still looking for a way to cash in on Grange's popularity, Mara scheduled a game against the Bears to be played at the Polo Grounds. The gate receipts totaled $143,000 for that one game against Grange and the Bears, and Mara recovered all of his losses for the 1925 season.

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