march madness 2023 4

The NCAA Division I men's basketball tournament, branded as March Madness, is a single-elimination tournament played in the United States to determine the men's college basketball national champion of the Division I level in the National Collegiate Athletic Association. Played mostly during March, the tournament consists of 68 teams and was first conducted in 1939. Known for its upsets of favored teams, it has become one of the biggest annual sporting events in the US. The 68-team format was adopted in 2011; it had remained largely unchanged since 1985 when it expanded to 64 teams. Before then, the tournament sized varied from as little as 8 to as many as 53. The field was restricted to conference champions until at-large bids were extended in 1975 and teams were not fully seeded until 1979. In 2020, the tournament was cancelled for the first time due to the COVID-19 pandemic; in the subsequent season, the tournament was contested completely in the state of Indiana as a precaution. Thirty-seven different schools have won the tournament to date.