Through the 2009 season, that was the 1990 season when Penn State defeated Alabama, 9-0, in Tuscaloosa.
The last time the Crimson Tide lost a game was Ole Miss 2015.
According to College Football Data Warehouse, Alabama's first football game was played November 11, 1892 against Birmingham High School. Alabama won 56-0. Ironically, their second game was the very next day against the Birmingham Athletic Club. Alabama lost that game 5-4.
Not this year ( 2009 ).They lost last week to the Alabama Crimson Tide 32 - 13 in the SEC championship game
Ohio state
For the 2006 regular season, UGA wound up 9-3 and played Virginia Tech in the Peach Bowl. UGA lost 31-24.
Prior to the 2010 season, that was 1999 when they lost to Florida State in the last game of the regular season, Alabama in the SEC Championship Game, and Michigan State in the Florida Citrus Bowl.
Alabama has never lost a national championship game.
Florida in 2009
Zero
Alabama
November 2009 at New Orleans.
NO