The 2019 World Series was the championship series of Major League Baseball's (MLB) 2019 season

The 2019 World Series was the championship series of Major League Baseball's (MLB) 2019 season. The 115th edition of the World Series, it was a best-of-seven playoff played between the American League champion Houston Astros and the National League champion Washington Nationals. The series was played from October 22 to October 30. The Nationals won the series, four games to three, to secure their first title in franchise history. It was the first best-of-seven postseason series in any of the major North American sports in which the road team won the first six games —a record at the time—and subsequently all seven games. Nationals pitcher Stephen Strasburg was named the World Series Most Valuable Player (MVP).

For the third straight year, MLB sold presenting sponsorships to all its postseason series; as with 2018 World Series, this World Series was sponsored by YouTube TV and was officially known as the 2019 World Series presented by YouTube TV.

Washington Nationals
Main article: 2019 Washington Nationals season

After starting the season with a win-loss record of 19–31 (.380), the Nationals ended the year with a 93–69 (.574) record. The Nationals finished in second place in the National League East, qualifying for the playoffs as a wild card team. They defeated the Milwaukee Brewers at home in the National League Wild Card Game.  The Nationals then defeated the Los Angeles Dodgers, who had won the previous two National League pennants, in the National League Division Series.  In the National League Championship Series, the Nationals swept the St. Louis Cardinals in four games to secure their first pennant in franchise history (including their time as the Montreal Expos from 1969 to 2004) as well as the first World Series appearance for a Washington, D.C., team since 1933.

Houston Astros
Main article: 2019 Houston Astros season

The Astros won the American League West and finished the 2019 regular season with a 107–55 (.660) win-loss record, which was the best in baseball.  They played the Tampa Bay Rays, who won the American League Wild Card Game, in the American League Division Series. Houston defeated the Rays in five games. In the American League Championship Series, the Astros defeated the New York Yankees in six games. This was Houston's third World Series appearance and second in three years.