On October 20, 2006, Magadan was named hitting coach for the Boston Red Sox. In his first season on the job, Magadan's Red Sox would go on to see great improvements in batting average (.269 to .279), slugging percentage (.435 to .444) and on-base percentage (.351 to .362), and led the American League with 689 walks. In 2007, Boston would finally end their archrival New York Yankees' nine-year run as American League Eastern division champions, and went on to sweep the Colorado Rockies in the 2007 World Series. The team batted .333 in the World Series.