Oklahoma knocked Iowa State from the ranks of the unbeaten with an 87-82 upset victory at the Lloyd Noble Center. 

As CBS Sports points out, there are now only four remaining undefeated teams in college basketball:

Arizona, Syracuse, Wisconsin and Wichita State are the only Division I squads without a loss as of this writing.

The Cyclones entered the game as the No. 9 team in the nation thanks to a 14-0 start. They were coming off arguably their biggest win of the year with a 15-point victory over No. 7 Baylor.

However, ...

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