Basketball - NCAA basketball questions?

NCAA basketball questions?

How many games is in a regular season for college basketball,and how many if any teams in NCAA basketball have gone undefeated? and in what years?

Since the NCAA tournament began in 1939, there have been 5 teams that have gone undefeated. The 1964, 67, 72, and 73 UCLA Bruins went undefeated. The last team to do it was the 1976 Indiana Hoosiers who finished the year 32-0.