The game yesterday concludes an unmatched run that OSU has been on since the start of the playoffs last year. OSU's last 5 wins have been against 9,1, 5, 7 and 1 again. 

According to ChatGPT, no team have ever beat 5 top 10 teams in a row so I assume they are looking at in 1 season. OSU's 4 consecutive top 10 wins in the playoffs is the most ever in a season. So the 5 wins over top 10 teams in a row over the 2 seasons has to also be the most ever. 

FYI, 2019 LSU holds the record for the most top 10 wins in a season at 7. With the new playoffs and mega conferences I think that one will get topped soon.