Ohio State's history playing top-ranked teams; how often No. 1s are underdogs

COLUMBUS, Ohio (WCMH) -- Saturday will mark the 18th time Ohio State plays a team ranked No. 1 in the Associated Press poll as it faces Texas at Ohio Stadium at noon.

The playoff semifinal rematch will be the first time in nearly 20 years that Ohio State is playing a No. 1 team in the regular season and the first time in six years an AP top-ranked team has gone into a regular season game as an underdog.

The Buckeyes have a vast history of playing top-ranked teams over the past century, from old-school Big Ten contests to modern playoff bowl games. Here is a look at some notable games Ohio State has played against No. 1 teams and how top-ranked teams have done as underdogs.

How often has the No. 1 team been an underdog?

Saturday's game will be just the third time in the playoff era that