Twelve times. The Red Sox won the World Series in 1903, 1912, 1915, 1916, 1918, 2004, 2007 and 2013.
They lost the World Series in 1946, 1967, 1975, and 1986.
The Boston Red Sox appeared in 11 World Series, winning 7.
Mike Lowell played on two World Series teams. The 2003 Florida Marlins and the 2007 Boston Red Sox.
The Boston Red Sox have won the World Series 8 times, which means they have 8 World Series Rings.
The Boston franchise has appeared in 12 World Series and won eight times.
8 World Championships19031912191519161918200420072013
They have won seven times in their history.
Once. In 2007 they made it to the world series and lost to The Boston Red Sox
4 times. 1946 and 1967 Cardinals prevailed in 7 games then the Red Sox swept the 2004 series. They met again in the 2013 series...
As of the start of the 2008 season, the Mariners have never played in a World Series.
Alex Rodriguez played in one World Series, 2009 with the Yankees.