SAN FRANCISCO (Interstat) — Javier Assad pitched six strong innings and Michael Busch hit a three-run homer as the Chicago Cubs defeated the San Francisco Giants 5-1 on Friday night at Oracle Park.

Assad (4-1) allowed three hits and no earned runs with five strikeouts. Busch’s homer in the fifth capped a three-run inning that broke the game open. Seiya Suzuki doubled in a run during the fourth.

The Cubs scored two in the fourth and three in the fifth. San Francisco’s lone run came on Bryce Eldridge’s solo homer in the ninth. Landen Roupp (5-7) took the loss, allowing four earned runs in 4 2/3 innings. Chicago had six hits; San Francisco had four.

Chicago improved to 36-34; the Giants fell to 28-42. Attendance was 38,115. The game lasted 2 hours, 31 minutes.