HOUSTON -- Having watched rotation mates Marcus Stroman, R.A. Dickey and Marco Estrada dominate the Houston Astros with pinpoint control, Toronto Blue Jays left-hander J.A. Happ merely fell in line Thursday night.

Happ worked six strong innings, and after amassing their six previous runs this series on solo homers, the Blue Jays added just one more solo shot in a 4-1 win over the Astros at Minute Maid Park.

Toronto (62-47) claimed the final three contests of the four-game set.

Happ (15-3) allowed one run on four hits and one walk with six strikeouts. He capped a stellar four-game series for Toronto starters, who issued just two walks over 27 innings.

"That's what we do," Blue Jays manager John Gibbons said of a staff mandate to throw strikes. "Our pitching coaches preach that. We've got a very, very good defense, too, so let those guys do their job out there. Let them put the ball in play, get ahead of hitters, and you've got a much better chance. We've got a pretty good pitching staff, that's for sure."

Said Happ: "It's something (pitching coach) Pete Walker really stressed to us at the start of the year. I think it's a big reason why we've had the success we've had is attacking the zone. We've got great defense, so we're letting the boys work."

Houston (56-52) lost for the eighth time in 10 games and scored one run for a third consecutive night, undermining a pitching staff that set a major league record with 61 strikeouts in the series.

The Astros bunched their two extra-base hits in the fifth, as Tyler White plated Evan Gattis with a double three batters after Gattis' leadoff double.

"It's been tough," said Astros shortstop Carlos Correa, who closed the series 3-for-13 with an RBI. "It's been really hard to get going. We have not been able to score runs early or late in the games, and that's frustrating."

Toronto took the finale by scoring on a first-inning groundout, a fifth-inning wild pitch and an eighth-inning single through a drawn-in infield before designated hitter Edwin Encarnacion clubbed his 30th home run leading off the ninth. Encarnacion homered off right-hander James Hoyt.

Astros right-hander Mike Fiers (7-5) lasted six innings, allowing five hits and two runs while striking out seven. He didn't issue a walk.

Fiers produced his third consecutive quality start despite falling behind 1-0 just three batters into the game courtesy of Devon Travis' leadoff double and a subsequent RBI groundout from Josh Donaldson.

When Travis crossed home, it marked the first time during the series that the Blue Jays recorded a run without doing so via a solo homer.

Fiers settled in quickly, retiring 12 consecutive batters through the close of the third. However, his inability to harness his arsenal proved costly in the fourth, with two wild pitches yielding a second run.

The Blue Jays maximized an infield single from Russell Martin, who advanced to second base on a wild pitch and reached third when Troy Tulowitzki slapped a single to left. Fiers rallied to strike out Justin Smoak, but the final pitch of that at-bat bounced away from catcher Gattis, enabling Martin to score as the Blue Jays took a 2-0 lead.

"Obviously, we know we've been struggling with the bats, but as a pitcher, I've got to go out there and do my job," Fiers said. "Everyone just needs to do their job and not worry about what everyone else is doing. Most of the time, we end up scoring and beating teams, but we're just going through a rough stretch."

NOTES: After contemplating transitioning RHP Aaron Sanchez to the bullpen, the Blue Jays instead opted to utilize a six-man rotation through the end of this month. Toronto acquired LHP Francisco Liriano from the Pirates on Monday and the veteran will start Friday night at Kansas City. Sanchez will follow on Saturday. The club will re-evaluate the arrangement in September. ... Astros INF Marwin Gonzalez remains hampered by a right hand/wrist injury that bothers him when he swings right-handed. Gonzalez was out of the lineup against Blue Jays LHP J.A. Happ, but should be able to start against Rangers LHP Martin Perez on Friday night. ... Blue Jays SS Troy Tulowitzki was back in the starting lineup after missing the first three games of the series with a chip fracture in his right thumb. Tulowitzki suffered the injury after being hit by a pitch in the sixth inning on Sunday against the Orioles.