RULESESPN's Bracketology efforts are focused on projecting the NCAA tournament field just as we expect the NCAA Division I basketball committee to select the field in March. 68-Team BracketThe 68-team bracket is the standard version of the NCAA tournament field that has been in place since 2011. If the 2021 field is comprised of 68 teams, there will be some key differences to past years, however. The primary adjustment from a normal year is, of course, the playing of the entire NCAA tournament at a single site. There are no automatic qualifiers, although all non-competing conference champions receive the designated revenue unit.