CHICAGO -- - Owen Caissie homered and drove in three runs, and the Chicago Cubs held off the Milwaukee Brewers for a 6-4 win in the opener of a split doubleheader on Tuesday.

Willi Castro also went deep as Chicago won for the third time in four games. Four Cubs relievers combined for 3 2/3 innings of two-hit ball after Matthew Boyd (12-6) departed in the sixth.

Chicago (71-54) pulled within eight games of NL Central-leading Milwaukee (79-46). The teams were originally scheduled for a doubleheader on Monday, but the second game was postponed by rain .

Christian Yelich homered for Milwaukee, and Sal Frelick had two hits and two RBI. It was just the third loss for the Brewers in their last 21 games.

Chicago built a 5-0 lead on Caissie's two-run single in the first and Castro

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