Okay, they really don't. However, it is fun to point out that Purdue has defeated the AP #1 team seven times in history, four of those times as an unranked team. That's tops in the country. Until very recently, Purdue had more wins against the AP #1 team all time than Ohio State (they're now tied).
What's more, Purdue has 17 wins over AP top 5 opponents as an unranked team all time.
So, it's still worth watching this weekend! I hope we won't need any Kenny G heroics this time out.
Go Bucks!