Joey Ortiz hit a tie-breaking grand slam in the sixth inning to help the visiting Milwaukee Brewers to a 7-2 win against the New York Mets on Wednesday afternoon in the opener of their four-game series, which was postponed by rain a night earlier.Isaac Collins went 4-for-4 with a walk and a solo home run and Sal Frelick had two hits, including a solo homer for Milwaukee, which has won five of six.Brewers starter Freddy Peralta (9-4) won his fourth consecutive start after allowing two runs and two hits over six innings, striking out six and walking one.Mets right-hander Clay Holmes went 5 1/3 innings, allowing two runs and three hits. He struck out one and walked four.The Mets have lost four in a row and 14 of the last 17 games.Holmes brought a 2-1 lead into the sixth inning but walked the leadoff batter before departing after getting a fly out. Brice Turang then greeted reliever Reed Garrett (2-4) with an opposite-field double down the left field line, scoring Christian Yelich from first to tie it 2-2.Collins followed with a line-drive single to left-center, putting runners on the corners with one out. Jake Bauers walked to load the bases, bringing up Ortiz, who had grounded into an inning-ending double play earlier in the game with the bases loaded.This time he pulled a full-count pitch over the fence in left for a grand slam and a 6-2 lead.