Christian Walker hit a grand slam in the third inning and the Arizona Diamondbacks beat the New York Mets 10-5 on Saturday to stop a five-game losing streak that matched their season high. Arizona, which took a 10-1 lead into the ninth, has scored 19 runs in its last two games after totaling nine in its previous six. “The grand slam really gave us a lift emotionally,” manager Torey Lovullo said.