The last World Baseball Classic (WBC) was held in 2017, and the winner of that tournament was the United States. It was their first title in the history of the WBC.
The quarterfinals of the 2017 WBC consisted of the following teams:
1. United States: The United States finished first in Pool C, defeating the Dominican Republic in the second round to advance to the quarterfinals.
2. Japan: Japan finished first in Pool E, defeating the Netherlands in the second round to secure their spot in the quarterfinals.
3. Puerto Rico: Puerto Rico finished first in Pool D, defeating Venezuela in the second round to advance.
4. Netherlands: The Netherlands finished second in Pool E, but their strong performance in the second round secured their place in the quarterfinals.
These four teams advanced to the semifinals, where the United States faced Japan and Puerto Rico faced the Netherlands. The United States and Puerto Rico emerged victorious in their respective semifinal matchups, leading to the United States winning the tournament by defeating Puerto Rico in the final.