National championships in men's college basketball
A national championship at the highest level of men's college basketball, currently NCAA Division I, is a designation awarded annually to the best college basketball team in the United States. The national championship is currently won by the champion of the NCAA Division I men's basketball tournament, a single-elimination tournament played to determine the men's Division I basketball champion.
Source: Wikipedia — National championships in men's college basketball (CC BY-SA 4.0)