SEATTLE (Interstat) — Gavin Sheets homered twice and drove in four runs as the San Diego Padres defeated the Seattle Mariners 8-3 on Sunday at T-Mobile Park.

Sheets went 3 for 3 with two home runs and four RBIs. Ty France contributed three hits and three RBIs for the Padres, who improved to 28-18. Lucas Giolito (1-0) allowed one hit and three earned runs over five innings, striking out three, to earn the win. Bradgley Rodriguez and Yuki Matsui combined for four scoreless innings of relief.

The Padres scored single runs in the first and fifth innings, then broke the game open with a five-run sixth that featured Sheets’ two-run homer, an RBI double by Jackson Merrill and a two-run single from France. Seattle answered with three runs in the bottom of the sixth on a walk, two sacrifice flies and a run-scoring groundout. San Diego added a run in the seventh on Sheets’ double.

George Kirby (5-3) took the loss, allowing six earned runs on six hits over 5 2/3 innings with six strikeouts. The Mariners managed just one hit as a team and fell to 22-26. Attendance was 40,365. Game time was 2:54.