Gattis supplied the big blow with a three-RBI double off rookie reliever James Pazos in a four-run sixth as the Astros put up their highest-scoring total of the season while improving to 5-4.

Miranda allowed seven hits and four runs in 5 2/3 innings and is 0-1 with a 5.06 ERA in two starts after taking the rotation spot of the injured Drew Smyly. Joe Musgrove picked up his first win of the year for Houston, giving up seven hits and three runs in 5 1/3 frames.

Taylor Motter had three doubles for Seattle, his first three hits of the season. Seattle scored twice in the ninth but could get no closer.

The Mariners fell to 2-7 on the season, including 2-4 against the Astros.

MOMENTS THAT MATTERED
Speed indeed: With Jean Segura going on the 10-day disabled list, Jarrod Dyson moved into the leadoff role for Seattle. And the little left fielder got things going for the Mariners in the third with a two-out single on a little dribbler to Musgrove, reaching first safely despite getting knocked off his feet in a collision with Yulieski Gurriel. Dyson scored from there on a double off the wall by rookie Mitch Haniger, slowing at third before scampering home when the throw went to second. Seattle then tied the game at 2 on a base hit by Robinson Cano.

Gattis comes through: Gattis didn’t hit the ball hard, but his bloop pinch-hit double to right field in the sixth scored three runs and proved to be the different. According to Statcast™, the ball had a 19 percent hit probability because it was hit at 75.1 mph and at a 32-degree launch angle. Haniger made a long run and got a glove on the ball as he slid. It was a good effort considering Statcast™ had it with a 32 percent catch probability, which combines hang time and distance covered by the outfielder.

SPRINGER DINGERS
Springer has four leadoff homers in the first nine games of the season, which is a Major League record. He has 13 leadoff homers in his career, which ties him with Terry Puhl for the second place on the Astros’ all-time list.

WHAT’S NEXT
Astros: Right-hander Mike Fiers will make his second start of the season in Wednesday’s 9:10 p.m. CT series finale against the Mariners at Safeco Field. He lost to the Royals on Friday in Houston, allowing five hits and one earned run in six innings.

Mariners: Veteran right-hander Yovani Gallardo makes his second start for the Mariners in Wednesday’s 7:10 p.m. PT series finale at Safeco Field. Gallardo gave up three runs in five innings in his debut in Anaheim, but now faces an Astros team that he’s had a lot of success against in the past (15-5, 3.15 ERA in 22 starts).

Watch every out-of-market regular-season game live on MLB.TV.