Since the NCAA Tournament expanded to a 64-team format, No. 1 seeds were undefeated. On more than 130 occasions, top seeds took care of business against No. 16 seeds and, while there have been some scares over the years, it always felt at least somewhat safe to project the top four teams in the field advancing to the second round. On Friday night, however, that changed forever, as UMBC put together a performance for the ages, taking it to No.