The first football season started in 1887.
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According to College Football Data Warehouse, Duquense has not won a consensus national championship, however, in 1941 they were named national champions by Massey Ratings system. They went 8-0 that season.
BYU did in 1984
Oklahoma in 2000 ranked 19
The 1999 Florida State Seminoles. They defeated Virginia Tech in the national championship and never once losing the number 1 ranking from pre-season to the national championship.
1988. Furman won the Division 1-AA championship in 1988 by defeating Georgia Southern in the championship game, 17-12. The Paladins record that season was 13-2.
Bob Stoops, Oklahoma won a national championship in his second season
In 2001 the Nebraska football team did not even make the Big Twelve championship game after losing to Colorado 62-36 in the final contest of the regular season and still went on to play in the national championship. Nebraska lost 37-14 against Miami in the national championship.
The championship game for the 2005 college football season was played at the Rose Bowl on January 4, 2006. The Texas Longhorns defeated the USC Trojans 41-38 to win the national championship.
The 2013-2014 championship football league started on August, 3 2013. The championship football league season ended on May 33, 2014.