the history of the new york giants from 1925 to 1978 covers the american football franchise from the team's inception until the conclusion of their tumultuous 1978 season. currently members of the nfl's national football conference, the giants were founded in 1925 by original owner tim mara in the then five-year-old nfl. mara gave control of the team over to his two sons—wellington and jack—early in their lives. during this period in their history the giants acquired four nfl championships, but also suffered some down times, including consecutive non-playoff seasons from 1964 to 1978.