Completely forgot we were unranked for the Duke game in 2000. That game is not as surprising in retrospect, since we were a clear top 10 team when the NCAA wasnt messing with Barkley, but I guess at the time we didnt realize (or the country didnt realize) we were quite that good.
I think 2004 might have been most surprising...how many scholarship players did we play with?
EDIT: Corrected factually per Poison's post.