Mike Napoli, who was a key member of the Boston Red Sox 2013 World Series championship team, has officially retired. He made the announcement on Twitter, attaching a photo of a longer statement to his tweet: Napoli, 37, hit 53 home runs and 187 RBIs while hitting .242 in three seasons in Boston (2013-15). His 12-year career began as a catcher for the Angels and moved to first base in Boston. He spent time with the Rangers and Indians as well. He finished his career with 267 home runs, 744 RBIs while hitting .246. He played in three World Series.