BOSTON — In just a few minutes, Boston’s hitters turned a slow offensive night into an easy victory.

Dustin Pedroia’s two-run double capped a seven-run sixth inning Thursday night that sent the Red Sox to their fourth straight win, 9-4 over the Houston Astros.

“We came to life. We were able to combine some base on balls with some base hits,” Manager John Farrell said. “It seemed like we got a couple of pitches up in the zone from (Scott) Feldman. The first time or two in the order he kept us in check and kept us off balance.”

Pedroia finished with three hits, Daniel Nava had two doubles and David Ortiz added two singles as the Red Sox improved to 8-0 at Fenway Park against the Astros.

Matt Dominguez hit a two-run homer for Houston, which opened a 10-game road trip with its fourth loss in five games.

Allen Webster (3-1) gave up four runs – three earned – and five hits in six innings for Boston.

“I grinded through it and then they took over with the seven runs,” the soft-spoken Webster said. “I can’t complain at all.”

Trailing 4-1, the Red Sox chased Feldman (6-9) during their biggest inning of the season.

“It just snowballed. He was one pitch away from getting out of it, but they just continued to find holes and continued to keep the line moving,” Houston Manager Bo Porter said.

“Before that he was in complete command of the game and really was commanding both sides of the plate.”

Pedroia’s ground-rule double bounced off the chalk on the right-field line and caromed into the stands.

Ortiz, Mike Napoli and Will Middlebrooks each had an RBI single before Jackie Bradley Jr. drew a bases-loaded walk from reliever Darin Downs that pushed Boston ahead 5-4.

Christian Vazquez had a sacrifice fly before Pedroia’s double. Brock Holt opened the inning with a hustle double and drew a walk as the Red Sox sent 12 batters to the plate.

Feldman was charged with seven runs on nine hits in 5 1/3 innings.

NOTES: Boston recalled right-hander Alex Wilson before the game and optioned right-hander Anthony Ranaudo to Triple-A Pawtucket.

Wilson, 27, is up with the Red Sox for the fifth time this season. He’s made three relief appearances, allowing two runs in 5 1/3 innings.

The 24-year old Ranaudo (2-0) was the winning pitcher in Boston’s 5-4 victory at Cincinnati on Wednesday. He’s won both of his starts with the Red Sox.