CHICAGO -- Anthony Rizzo went 2-for-2 with a two-run home run, and the Chicago Cubs beat the San Francisco Giants 2-0 in a game that was delayed due to poor field conditions and finally called after 4 1/2 innings.

An intense 15-minute downpour halfway through the fifth inning led to a 4-hour, 34-minute weather delay before the contest was finally called at 1:16 a.m. CT and declared an official game.

The Cubs' grounds crews had difficultly covering the left side of the infield, leading to drenched dirt and more extensive work in an unsuccessful attempt to make it playable.

Cubs left-handed starter Tsuyoshi Wada (3-1) worked five shutout innings and allowed six hits and no walks while striking out three.