Christian Koss and Heliot Ramos each drove in two runs in a five-run sixth inning, Jung Ho Lee collected three hits, including a home run, and the San Francisco Giants outlasted the visiting Arizona Diamondbacks 11-5 in the opener of a three-game series Monday night.

Logan Webb made his 30th start of the season a winning one, limiting the Diamondbacks to one earned run (four total) in six innings as the Giants won for the seventh time in their last eight home games.

After a bases-clearing triple by Jake McCarthy had helped Arizona play the Giants evenly at 4-4 through 5 1/2 innings, the hosts took charge in the last of the sixth after an error, a walk and a bunt single by Lee loaded the bases with no outs against Diamondbacks reliever Brandyn Garcia (0-1).

Koss then lashed a tiebreaking, two-run double to right field, after which Patrick Bailey added a sacrifice fly and Ramos his 17th homer, a two-RBI shot that made it 9-4.

Dominic Smith (his fifth), Matt Chapman (21st) and Bailey (fourth) also homered for the Giants.

Lee, whose homer was his eighth, also singled twice, scored twice and drove in two runs for the Giants, who were coming off back-to-back losses at St. Louis over the weekend to end a week-long trip.

Koss, Chapman and Willy Adames also had multiple-hit games with two apiece, Chapman scored twice, and Bailey and Smith joined Koss, Lee and Ramos with two RBIs each.

Webb (14-9) allowed five hits in his six innings with two walks and seven strikeouts.

Arizona starter Nabil Crismatt was pulled after four innings in a 4-4 tie, having allowed six hits. He walked one and struck out three.

Ketel Marte had three hits and Gabriel Moreno launched his eighth homer, a solo shot, for the Diamondbacks (72-73), who fell 1 1/2 games behind the Giants (73-71) in their duel for third place in the National League West.