"Greatest Game Ever Played": The Baltimore Colts defeat the New York Giants in the first ever National Football League sudden death overtime game at New York's Yankee Stadium to win the NFL Championship.

The 1958 NFL Championship Game was the 26th NFL championship game, played on December 28 at Yankee Stadium in New York City. It was the first NFL game to be decided in sudden death overtime. The Baltimore Colts defeated the New York Giants 23–17 in what soon became widely known as "the Greatest Game Ever Played". Its legendary status in the pantheon of historic NFL games was again confirmed by a nationwide poll of 66 media members in 2019, who voted it the best game in the league's first 100 years.

The Indianapolis Colts are a professional American football team based in Indianapolis, Indiana. They play in the South Division of the American Football Conference (AFC) in the National Football League (NFL). The organization began play in 1953 as the Baltimore Colts with the team located in Baltimore, Maryland; it relocated to Indianapolis following the 1983 season.

The New York Giants are a professional American football team based in the New York metropolitan area. The Giants compete in the National Football League (NFL) as a member of the National Football Conference (NFC) East division. The team plays its home games at MetLife Stadium at the Meadowlands Sports Complex in East Rutherford, New Jersey, five miles west of New York City. The Giants are headquartered and practice at the Quest Diagnostics Training Center, also in the Meadowlands.

The National Football League (NFL) is a professional American football league in the United States. Composed of 32 teams, it is divided equally between the American Football Conference (AFC) and the National Football Conference (NFC). The NFL is one of the major professional sports leagues in the United States and Canada and the highest professional level of American football in the world. Each NFL season begins annually with a three-week preseason in August, followed by the 18-week regular season, which runs from early September to early January, with each team playing 17 games and having one bye week. Following the conclusion of the regular season, seven teams from each conference, including the four division winners and three wild card teams, advance to the playoffs, a single-elimination tournament, which culminates in the Super Bowl, played in early February between the winners of the AFC and NFC championship games. The NFL is headquartered in Midtown Manhattan.