Tennessee, 1998 LSU, 2003 Florida, 2006 LSU, 2007 I only went back to 1998 because, prior to 1998, NCAA football championships were not won, on the field, in a game. Only with the establishment of the BCS in 1998 was there a "national championship game", pitting the two top teams in the country against each other. Admittedly, there were times when the system screwed up, like in 2004, when an undefeated Auburn was locked out of the National Championship game even though they were much better than the two teams that played in it (USC and Oklahoma). But the BCS is still a much better system than the popularity contest that existed prior to it, when national championships were awarded, based on the outcome of some vote of sports writers, coaches, or others. But, if you insist on going back to 1990, and considering national championships that were awarded, rather than won, you can add: Alabama, 1992 Florida, 1996
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