It has never been done.
The last men's team to go undefeated during the regular season and win the tournament was Indiana in 1976.
The University of Tennessee Lady Volunteers basketball team was undefeated in the 1997-1998 season. The team won the NCAA Championship and had a record for the season of 39-0.
UNLV 1991
University of Memphis Basketball Team is undefeated.
Miami dolphins
Answer The University of Memphis has a basketball team that is going to play in the "Final Four" playoffs. They went undefeated during the regular season for 19 straight games.
Villanova
San Francisco, 1956 (29-0)
1957-58, the team went 21-0 and was the class c sectional champion
Uconn was the last undefeated team. They went 39-0 in 2001
Uconn women has won 7 championships went 39-0 whole season. They also went 4 season undefeated, and won 78 games in a row.
The Miami Dolphins went undefeated in 1972. They are still the only team to go undefeated during the regular season to go on and win the Super Bowl.