SAN DIEGO — Ryan O’Hearn’s grand slam was one of San Diego’s three home runs while Randy Vásquez and two relievers combined on a four-hitter as the Padres beat the NL Central champion Milwaukee Brewers 7-0 on Tuesday in what could be a playoff preview.

The loss by the Brewers (95-63) assures no 100-game winners in consecutive seasons for the first time since 2012-14. The Brewers’ magic number for clinching the best record in the majors and home-field advantage throughout the postseason is down to two over Philadelphia.

The Padres have won four straight, including the first two games in this three-game series. They clinched a postseason berth with a 5-4, 11-inning win on Monday night.

San Diego pulled within 1 1/2 games of the Chicago Cubs in the race for the National League’s top wi

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