SAN DIEGO — After such a promising start, the San Diego Padres have come to a grinding halt.
Although they lead the NL in runs, the Padres' bats have gone dormant and the pitching has been even worse.
Evan Gattis added a two-run shot and Chris Carter connected for a solo drive as the Astros hit three home runs at spacious Petco Park for the second consecutive night. The AL West leaders, who have won five straight and nine of 10, set season highs for runs and hits (16).
"They jumped on our pitchers," San Diego manager Bud Black said. "We didn't pitch well at all from the get-go. Not many quality pitches as the night went on. It was a tough night for a lot of our pitchers."
Padres starter Tyson Ross (1-2), who walked six in his previous outing, struck out nine in five innings. But the two batters he walked both scored, and the right-hander allowed four runs on five hits.
San Diego has dropped six of seven.
"Just not locating my pitches well," Ross said. "They are up over the plate and you just can't do that. It's early, but I've got to get better and start to do what I was doing last year."
Springer hit a two-run homer in the seventh inning and added a two-run single in the eighth as he tied his career high for RBIs.
Houston (13-7) is 9-2 on the road, equaling the best 11-game start away from home in team history.
"There is a lot of energy, a lot of confidence," manager A.J. Hinch said. "We've been playing good baseball, not error-free. But this brings a lot of smiles. Winning really does bring a togetherness to this group."
Altuve, the reigning AL batting champ, went 4 for 6 with an RBI to raise his batting average to .348 and extend his hitting streak to seven games. Altuve is batting .429 (15 for 35) with nine RBIs during the streak.
Gattis put Houston ahead with his home run in the first inning — with some help from Myers.
As Myers jumped in front of the center-field wall, the ball caromed off his glove, then bounced off the top of the fence for Gattis' second home run.
With the Astros playing an interleague game in an NL park, Gattis made his first start in left field after serving as the designated hitter in 16 of Houston's 18 AL games.
Myers had three hits and scored two runs.
Myers' home run traveled an estimated 445 feet to left-center and sailed beyond the visitors' bullpen, which sits up one level from the home bullpen behind the fence. It was the eighth-longest home run in the 11-plus years since the downtown ballpark opened.
Astros: SS Jed Lowrie will have surgery after he was placed on the 15-day DL with a torn ligament in his right thumb. He is expected to be out until after the All-Star break. Lowrie was injured sliding into home plate Monday night.
Padres: RHP Josh Johnson threw 40 pitches in a simulated game. The workout came one year and three days after his second Tommy John surgery.
Astros: LHP Dallas Keuchel (2-0, 0.62 ERA) threw two-hit ball over nine shutout innings in his most recent outing against Oakland.
Padres: RHP Andrew Cashner (1-3, 2.63) has allowed no more than two earned runs in 20 consecutive starts at Petco Park. ... Struggling 2B Jedd Gyorko, batting .143 with three RBIs, is expected to make his second start in eight games Wednesday.