With Purdue's crowning on Monday, Dec. 6, as the No. 1 men's basketball team in the AP poll for the first time ever, 60 Division I men's college basketball programs have been ranked No. 1 in the AP poll's history. The AP poll having started in the sport in the 1948-49 season. Put in another context, if you tried to fill out a 68-team NCAA tournament bracket with only schools that have been ranked No. 1 in the country at some point, ever, you'd still be eight schools short.