UCLA
The last men's team to go undefeated during the regular season and win the tournament was Indiana in 1976.
The last women's team to go undefeated and go on to win the national championship was the 2001-2002 Connecticut Huskies that went 39-0. Tennessee Volunteers were undefeated in 1998 and wre also 39-0.
No team every team lost at least 1 game
Miami Dolphins
the dallas mavericks the best team in the nba
Wisconsin
Ken Dorsey was the qb when the Canes beat Nebraska in the 2002 Rose Bowl (2001 season) to complete a perfect season. The 2001 Canes team is widely considered the greatest team in college football history.
Minnesota Vikings, 1969.
cardiff
Arsenal went undefeated in the 2003-2004 premier league season
This was the first unranked team to win the championship
San Francisco, 1956 (29-0)