IMHO, Sox sent him over here for the winter so he has a chance to prove he deserves a shot, since this is one of the toughest leagues around (probably above AAA), plus this league beats Philly and NY for Most.Annoying.Fans.Ever, if a foreigner can keep his cool in this league and produce, which he's doing on offense and defense, chances are you'll get a shot to prove yourself at the Bigs.
That is, of course, unless the Sox acquire Russell Martin or one of the Texas big 3, (3,'cause Laird, really?, come on.....), otherwise he'll probably have a shot.