Ryan O’Hearn’s grand slam was one of San Diego’s three homers and Randy Vásquez and two relievers combined on a four-hitter as the Padres beat the NL Central champion Milwaukee Brewers 7-0 Tuesday night 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 homefield 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 wild card and the rig

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