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Andy Wittry | NCAA.com | January 8, 2019

Undefeated college football teams in 2018

Clemson defeated Alabama in the 2019 College Football Playoff national championship to finish the season 15-0 and as the only unbeaten team in the 2018 college football season. Alabama and Clemson each entered the championship game 14-0, but only the Tigers left the season without a loss and with a new trophy to bring home.

Notre Dame and UCF were the other two undefeated teams entering bowl season. Notre Dame lost to Clemson in the College Football Playoff semifinals in the Cotton Bowl. UCF lost to LSU in the Fiesta Bowl.

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No. 2 Clemson (15-0)

In the end, Clemson was the best team. The Tigers knocked off Alabama in impressive fashion, 44-16, to become the only team to finish the season undefeated in the College Football Playoff era so far. Clemson won its second national championship in three seasons and avenged last season's semifinal loss to Alabama in the process.

With freshman quarterback Trevor Lawrence back in 2019, the Tigers will be the team to beat next season.