This was Lamine Yamal's season. So it just had to be the teenage phenom who scored the decisive goal to clinch Barcelona's 28th Spanish league title. And what a goal it was. The 17-year-old struck the winner in Barcelona's 2-0 victory at crosstown rival Espanyol on Thursday when he slid past two defenders outside the area and whipped one his now trademark left-footed curlers into the corner of the net.