April fourth
Michigan State did not make the NCAA tournament in 1980 after winning the championship in 1979. Florida did not make the NCAA tournament in 2008 after winning the 2007 championship. North Carolina won the NCAA tournament in 2009 and will not make the tournament in 2010.
They have made it to the tournament 43 times. And they have won 11 of the NCAA tournament championships.
Single Elimination
The most recent team to win a championship and not return to the tournament was last year's champions, the UNC Tar Heels. UNC won the national championship over MSU last year. This year UNC did not make the NCAA March Madness tournament everyone knows and loves but did make it into the NIT tournament.
There were 53 teams in the 1984 NCAA Men's Basketball Championship (5 play-in games before the tournament).
2010 NCAA Basketball Championship Duke over Butler
NCAA Championship 1960 OSU They Have Won One
Illinois
Trophy and national championship
Marquette was the #16 seed in the NCAA Men's basketball tournament in 1977. They advanced and won the championship. They were also the only team to ever beat all 4 #1 seeds during the ncaa tournament.
Click the link.
They have 6 championships. They have 5 NCAA tournament championships and 1 Pre-tournament championship.