The Boston Red Sox have won Major League Baseball's World Series, sweeping away the Colorado Rockies with four straight victories.

The American League Red Sox beat the National League's Rockies, 4-3, late Sunday to clinch the best-of-seven-games championship in Denver, Colorado.

Boston built a 3-0 lead by the seventh inning, and the Red Sox were up 4-1 in the eighth when Colorado's Garrett Atkins hit a two-run home run. But Boston's ace relief pitcher, Jonathan Papelbon, shut down the Rockies to preserve the win.

Boston also won the 2004 World Series by beating the St. Louis Cardinals in four straight games.

Colorado came into the series having won 21 of their last 22 games, while Boston came back from a three-games-to-one deficit to beat the Cleveland Indians for the American League title.