Markus Lynn "Mookie" Betts (born October 7, 1992), is an American professional baseball second baseman and outfielder for the Boston Red Sox of Major League Baseball (MLB). Betts is listed at 5'9", 156 pounds, and bats and throws right handed. Entering the 2014 season, he was rated the 74th best prospect by Baseball America, while MLB.com ranked Betts the 58th-best overall prospect and third among second basemen.