Scratching for runs while losing three straight in Oakland left the New York Yankees in a mood heading south to Los Angeles. Didi Gregorius hit a grand slam off All-Star Hyun-Jin Ryu and added a solo shot to help the Yankees set a club record for homers in a month in a 10-2 victory Friday night in a matchup of the two teams with the best records in baseball. ''We needed a rebound game,'' slugger Aaron Judge said.