CHICAGO (AP) — Scott Hairston hit a grand slam and Matt Garza got his first victory of the season and the Chicago Cubs extended their winning streak to five games by defeating the Arizona Diamondbacks 7-2 on Friday.

Alfonso Soriano had a two-run homer and Cody Ransom added a solo shot for the Cubs, who have won five straight for the first time since winning seven in a row from July 31-Aug. 6, 2011.

Hairston's grand slam was the second in two games for the Cubs. Pitcher Travis Wood hit one on Thursday in a win over the White Sox.

Garza, who was making his third start of the season since coming off the disabled list with a strained back muscle, pitched seven innings and allowed two runs and six hits while striking out four for his first victory since July 15 of last season.

Garza (1-0), who was also making his first home start of the season, bounced back from his previous start, when he gave up four runs in four innings last Sunday in Cincinnati.