2011
2008
2005
This has never happened. In 2006 and 1980 there were no number 1 seeds, but both years there was one number 2 seed remaining. 2011 was the first year that there was no number 1 or number 2 seeds that made the final four.
2008 is the first year, since teams began being seeded in 1979, that four #1 seeds made the Final Four. Those teams are North Carolina, Kansas, Memphis and UCLA.
2011 is the third year no #1's made it. First was in 1980 and second was in 2006.
2011. This is the first time it has happened
Since seeding began in 1979, 19 of the champions were #1 seeds. 2008 is the only year in which all four #1 seeds made it to the Final Four. (This is as through the 2012 tournament.)
2011 is the only year
2008
None of them made it this year which would be 2011.
Yes 2011