The last 7 national championships have been won by double digits
2018 Clemson defeats Alabama 44-16
2019 LSU defeats Clemson 42-25
2020 Alabama defeats Ohio St 52-24
2021 Georgia defeats Alabama 33-18
2022 Georgia defeats TCU 65-7
2023 Michigan defeats Washington 34-13
2024 Ohio State defeats Notre Dame 34-23
2021 was a competitive game until the Kelee Ringo pick 6 which made the final score be 15 instead of 8. But it was a mostly close game.
In the previous 8 title games before the above...2010, 2013, 2015, 2016, 2017 were all very close games, but we have mostly gotten blow outs recently. There have been some amazing semi finals matches though.