Alabama in 2011 and 2012.
You can find all champions of the National College Football team on the website of Wikipedia. College football is the highest level of collegiate play in the United States.
Georgia tech beat cumberland college 222 - 0
Michigan has the highest winning percentage and the most wins
Georgia Tech defeated Cumberland 220-0
Steelers are the best NFL football team and the Panthers are the best college football team. steelers are awesome, but they lost the 2011 NFL by six points 25-31.