The Boston Red Sox announced Wednesday that John Farrell will not return as the team's manager for the 2018 season.
A search for a new manager will begin immediately, president of baseball operations Dave Dombrowski said. Farrell, 55, was 432-378 (.533) in five seasons, leading the Red Sox to the World Series title in 2013.
He was under contract through the end of the 2018 season. The Red Sox were eliminated from the playoffs on Monday, losing to the Houston Astros 5-4 in Game 4 of the American League Division Series.
Boston finished 93-69 (.574) in 2017 to win its ninth American League East division title. The Red Sox had the third-best record in the American League, tied for fifth best in the majors.
During his Red Sox tenure (2013-17), Farrell's teams won three division titles (2013, 2016, 2017). His 432 managerial wins and 810 games managed both rank sixth in club history, and he is the only manager ever to lead the Red Sox to consecutive division titles.
Farrell's first season was highlighted by Boston's eighth World Series championship. Farrell began his major league managerial career with the Toronto Blue Jays in 2011, leading the team to a 154-170 record over two seasons.
In his seven full seasons as a manager, his clubs went 586-548 (.517). Farrell's first professional coaching stint began with the Red Sox in 2007 when he spent four seasons as Boston's pitching coach.
Over that four-year span, the Red Sox had three postseason appearances (2007-09), including the 2007 World Series title.