CHICAGO — Matt Chapman hit his fourth career grand slam in the fourth inning and added a three-run shot to cap San Francisco’s seven-run sixth inning and the Giants pounded the slumping Chicago Cubs 18-3 on Friday.

Willy Adames and Casey Schmitt each added a pair of home runs as the Giants dealt the Cubs their 19th loss in 25 games. Jonah Cox had a solo shot among three hits.

Chapman hit the Giants’ second grand slam in two days, and sixth this season — all in San Francisco’s last 18 games. He added a sacrifice fly to finish with a career-high eight RBIs.

Schmitt finished with four hits, hitting his second homer of the game and team-leading 15th off Chicago catcher Carson Kelly, who pitched the ninth. The Giants finished with 19 hits to followed up on a 20-hit, 12-9 win at Milwaukee on Thursday.

Seiya Suzuki hit a solo shot for the Cubs. Kelly had two hits and an RBI.

Giants starter Robbie Ray (4-6) allowed no runs on two hits in five innings for the win, despite five walks.

The Giants scored their first eight runs on eight hits off Edward Cabrera (3-3), who lasted 3 2/3 innings in his return from a blister on his right middle finger.

The Giants jumped ahead 2-0 in the first on Adames’ 427-foot homer that cleared the bleachers. San Francisco scored six more in the fourth, posting a six-run inning for the second straight day.