 Complete the following phrase:  They defeated the Colorado Rockies in the 2018 National League West tie-breaker game to claim their sixth straight National League West Championship and became the first team to win six straight division championships since the New York Yankees won nine straight from 1998 to 2006 and only the third overall the Atlanta Braves won 14 from 1991 to 2005. They opened the playoffs by defeating the Atlanta Braves in four games in the Division Series and defeated the Milwaukee Brewers in seven games in the National League Championship Series. It was the third straight NLCS appearance for the Dodgers, a franchise record and the second consecutive National League pent. They lost to the Boston Red Sox in the 2018 World Series, their second straight World Series loss. The Dodgers became the first team to lose back-to-back World Series since the Texas Rangers did so in 2010 and 