NFL and the Chicago Bears, Red Grange and his agent C.C. Pyle formed the first American Football League and fielded a team called the New York Yankees based in Yankee Stadium. The league failed after only one year, but the team continued as a member of the NFL for two seasons before ceasing operations. A second New York Yankees football team, not related to the first, split its home games between Yankee Stadium and Downing Stadium as it competed in the second AFL in 1936 and 1937. A third AFL New York Yankees took the field in 1940 and became the New York Americans in 1941. The New York Yankees of the All-America Football Conference (AAFC) played their home games at Yankee Stadium from 1946 to 1949. The 1947 AAFC championship game was held at Yankee Stadium. Following the 1949 season, the NFL New York Bulldogs acquired many of the players from the 1949 Yankees. Using the name the New York Yanks they played two seasons at Yankee Stadium, 1950 and 1951. The New York Giants of the NFL played their home games at Yankee Stadium from 1956 to 1973. On December 28, 1958, Yankee Stadium hosted the 1958 NFL championship game, frequently called "The Greatest Game Ever Played". The Baltimore Colts tied the Giants, 17–17, on a field goal with seven seconds left. Led by quarterback Johnny Unitas, the Colts won in overtime, 23–17. The game's dramatic ending is often cited as elevating professional football to one of the United States' major sports. The game was one of three NFL championships games that were played at Yankee Stadium; the 1956 and 1962 championship games were also played there. In addition to the NFL championship games, one of the most notable plays in NFL history, sometimes referred to simply as The Hit, occurred at Yankee Stadium on November 20, 1960. In a game that day, the Philadelphia Eagles' Chuck Bednarik forcefully tackled the Giants' Frank Gifford in the last minute of a close game, forcing a fumble recovered by the Eagles that clinched the victory for Philadelphia and ultimately helped the Eagles dethrone the two-time defending champion Giants as NFL Eastern Conference champions. The hit left Gifford with a concussion and forced his temporary retirement from football for the remainder of the 1960 season and all of the 1961 season. The Giants played their first two home games at Yankee