Barcelona: This was Lamine Yamals season. So it just had to be the teenage phenom who scored the decisive goal to clinch Barcelonas 28th Spanish league title. And what a goal it was for the player who still wears dental braces and sports a new dyed-blond hairdo. The 17-year-old struck the winner in Barcelonas 2-0 victory at crosstown rival Espanyol on Thursday when he slid past two defenders outside the area and whipped one of his now trademark left-footed curlers into the corner of the net