(Photo credit: Matt Marton-Imagn Images)

Matt Chapman hit a grand slam and a three-run homer, Willy Adames and Casey Schmitt each chipped in a pair of homers and the visiting San Francisco Giants routed the Chicago Cubs 18-3 on Friday afternoon in the rain-delayed opener of a three-game series.

The Giants picked up in Chicago where they left off in Milwaukee as Chapman finished with a career-high eight RBIs, Adames scored four times and drove in four and Schmitt logged four hits, three runs and three RBIs to propel the Giants to their second-highest run total of the season.

Robbie Ray (4-6) benefitted from the 19-hit onslaught to win for the first time since May 8. He coasted through five shutout innings, allowing two hits and five walks while striking out four.

After the game was held up for an hour by rain, the Giants, coming off a 12-run explosion in Milwaukee on Thursday, jumped on Cubs starter Edward Cabrera for two runs in the first when Luis Arraez lashed a two-out double and Adames followed with a home run.

The visitors blew the game open in the fourth when Chapman followed an Arraez single, Adames walk and Bryce Eldridge single with his fourth career grand slam. One out later, Schmitt launched a two-run shot to left-center for an 8-0 lead.

Cabrera (3-3) was pulled two outs into the fourth and charged with eight runs on eight hits. He walked one and struck out six.

Adames' second two-run blast, his 11th homer of the year, and Chapman's three-run shot, his fourth, highlighted a seven-run sixth that push San Francisco's lead to 16-0.

Rookie outfielder Jonah Cox joined the fun in the ninth with his first homer as part of a back-to-back effort with Schmitt, who ran his season total to 15.

Coming off a ninth-inning rally that produced a walk-off win over the Athletics on Thursday, the Cubs didn't score until an RBI single by Carson Kelly in the sixth.

Seiya Suzuki homered, his ninth, as part of a two-run eighth that capped the Cubs' scoring.

Cox, who came off the bench, wound up going 3-for-3 while Arraez, Eldridge and Rafael Devers had two hits apiece for the Giants, whose 18 runs equaled their second-most in franchise history at Wrigley Field. It trailed only a 19-3 win in Game 1 of a doubleheader on July 4, 1961.

Kelly and reserve Pedro Ramirez had two hits each for Chicago, which finished the game with Kelly on the mound.

--Field Level Media