Fifa has confirmed that Barcelona is able to sign new players this year, but they could not register them before the end of their transfer ban next January. Blinding in his bright peach uniform, Messi scored twice in the first half and FC Barcelona continued its preseason tour of the U.S. with a 4-0 victory over the Seattle Sounders FC. Messi beat Seattle keeper Kasey Keller in the 21st minute….