The Boston Red Sox have added a big bat to the middle of their lineup.
Boston yesterday signed free agent JD Martinez to a five year, 110-million-dollar contract.
Martinez hit 45 home runs last year with Detroit and Arizona, and will likely be the full time designated hitter for Boston.
He's expected to add some punch to Boston's lineup, as the team was at the bottom of the American League in home runs last year.
(Photo by Jeff Gross/Getty Images)