NCAA Tournament officially begins Tuesday and Wednesday with First Four action followed by first- and second-round games on Thursday and Friday as part of a rollercoaster opening week that will see the 68-team field quickly shrink to a Sweet 16 in the span of six days.

Greif: Florida. The West Region is the tournament’s most difficult on paper with the top-seeded Gators surrounded by St. John’s, Texas Tech and Maryland, all of which are ranked in the nation’s top 12 by Ken Pomeroy, whose rankings are something of a Bible in the sport.