NCAA Division I baseball tournament

The NCAA Division I Baseball Championship is held each year starting in late May through mid June and features 64 college baseball teams in the United States, culminating in the eight-team Men's College World Series (MCWS) at Charles Schwab Field Omaha in Omaha, Nebraska. The tournament is unique in that it features four tiers of competition, alternating between double-elimination brackets and best-of-three series.

Source: Wikipedia — NCAA Division I baseball tournament (CC BY-SA 4.0)