Watched by its grieving coach, Barcelona won its second straight Spanish league title and 29th overall with a comfortable 2-0 win over Real Madrid at Camp Nou on Sunday, adding to its rival's troubled season. Goals by Marcus Rashford in the ninth minute and Ferran Torres in the 18th gave Barcelona the victory and an insurmountable 14-point advantage over its fierce rival with three rounds remaining in La Liga. Barcelona coach Hansi Flick was in the dugout for Sunday’s clasico following the death of his father, which Barcelona announced hours before kickoff. Players from both teams wore black armbands and there was a moment of silence before kickoff. A draw would also have been enough for the Catalan club to seal its third league title in four seasons. Madrid, which remains the most successful club in the league with 36 trophies, is ending a second consecutive season without a major title.…