Chicago Cubs' Owen Caissie (19) hits his first major league career home run during the sixth inning in the first game of a doubleheader against Milwaukee on Tuesday in Chicago. (AP Photo/Erin Hooley)

CHICAGO (AP) — 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

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