Mets phenom Steven Matz has a lat muscle injury and will miss at least several weeks, two baseball sources told the Daily News Thursday. It's the latest blow for a franchise that has been rocked with injuries. Matz, a Long Island kid who grew up rooting for the Mets, has a partial tear of the lat muscle on his left side, according to the Mets official Twitter account. He will not throw for at least three weeks, and then will be re-examined, according to the Mets. - See more at: http://m.nydailynews.com/sports/bas...e=twitter.com&utm_campaign=NYDNSports Twitter