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.

The Cubs and Brewers are in the midst of a crucial series that features five games in a four-day span. An already-daunting schedule for the rivals was thrown a wrench on Monday, when rain forced the teams to move the planned doubleheader to Tuesday.