SEATTLE -- The Houston Astros hit three tape-measure home runs Sunday afternoon.

Yet all anyone in the Astros clubhouse talked about after the game was the performance of the bullpen.

Four Houston relievers -- Michael Feliz, Chris Devenski, Will Harris and Luke Gregerson -- combined for seven scoreless innings of three-hit relief as the Astros beat the Seattle Mariners 8-2 at Safeco Field.

After losing the opener 13-3, the Astros won the final two games of the series.

"They came up with huge innings and they came in and threw very well," Astros manager A.J. Hinch said of his bullpen. "Obviously, it's big to get a series win against these guys on the road, the way they've been playing.

"We needed all of our guys to step up. The versatility of our 'pen has been talked about over and over again and it was in full effect today. All of those guys came in and did a nice job of stretching themselves to their limitations."

That was needed because rookie right-hander Francis Martes, starting in place of Brad Peacock (paternity list), lasted just two innings with control problems.

Feliz (3-1) got the victory with two hitless innings in which he struck out four, including Nelson Cruz, Kyle Seager and Mike Zunino in order in the third.

After the game, Feliz found the Astros' championship belt, which is bestowed by teammates to the player of the game, in his locker.

"This is my first time getting the belt," Feliz said. "I'm happy."

Devenski followed with 2 2/3 innings of one-hit relief, striking out two.

"I knew coming in in the fifth I'd have to go deep to hand off to the end of the bullpen," Devenski said. "That was a good team win there."

Harris got Mitch Haniger to fly out with two runners on in the seventh, then retired Robinson Cano, Cruz and Seager, the Nos. 3-4-5 hitters in the Mariners' lineup, in order in the eighth with Houston hanging on to a 4-2 lead.

"We're obviously a deep group out there," Harris said. "I think the idea with an off day (Monday) is it's all hands on deck.

"A.J. made the right call. He does a good job just spreading the innings around."

The Astros scored four runs in the ninth to take an 8-2 lead. Gregerson got out of a bases-loaded jam in the bottom of the ninth after allowing two singles and a walk.

"One guy after another kept putting up zeroes," Hinch said.

As for those tape-measure home runs?

George Springer and Yuli Gurriel both homered in a four-run fourth inning against Seattle starter Ariel Miranda (6-4) as the Astros erased a 2-0 deficit.

Springer led off the inning with his 22nd home run, a 456-foot blast to straightaway center field that hit nearly halfway up the black batter's eye beyond the fence. It was the longest home run hit at Safeco Field this season.

Jose Altuve then hit a chopper down the third base line that Miranda fielded, but he threw the ball errantly past first in his rush to get the speedy runner. Altuve was credited with an infield single and advanced to second on the error.

Carlos Correa doubled into the gap in right-center field to score Altuve with the tying run.

Two outs later, Gurriel hit his eighth homer of the season, a two-run shot into the upper deck in left field that was estimated at 420 feet.

That was the only inning in which the Astros threatened against Miranda. In 7 1/3 innings, the Cuban left-hander allowed five hits -- four of those in the fourth.

Evan Gattis hit a two-run shot into the upper deck in left field in the ninth off Mariners reliever James Pazos. The 426-foot blast was Gattis' fifth homer of the season and made it 6-2.

The Astros added two more runs in the ninth, on Josh Reddick's RBI single and a bases-loaded walk to Altuve.

Martes went two innings, allowing two runs on two hits with four walks and three strikeouts. Of his 63 pitches, only 34 were for strikes as he loaded the bases in the first on three walks and in the second on an infield single, a walk and a hit batter.

With the bases loaded and two outs in the bottom of the second, Cano hit a double into left-center field.

Two runs scored, but Haniger was thrown out at the plate on a strong relay throw from shortstop Correa.

Mariners manager Scott Servais challenged home-plate umpire Lance Barksdale's call, believing Haniger had touched home plate with his hand before catcher Gattis applied the tag.

After a review of two minutes, 41 seconds, first-base umpire Angel Hernandez, the crew chief, put both hands out to his sides in what appeared to be a safe call, drawing applause from the crowd of 33,010 and bringing Hinch halfway out to the mound to make a pitching change.

But Hernandez apparently was trying to indicate the call stood.

That led Hinch to return to the dugout, the crowd to boo lustily and Servais to come out of the dugout to confront Hernandez.

"I was shocked that was not overturned," Servais said. "I'm not sure what the people in New York (at Major League Baseball's review center) are looking at, obviously not the same thing we are.

"The call stood. He was out, but Angel Hernandez made the safe sign. He said he screwed up and gave the wrong sign."

NOTES: The Astros went 6-1 on their seven-game trip. They're 29-9 on the road. ... Houston and Seattle are both off Monday. The Astros open a three-game series Tuesday at home against Oakland. RHP Mike Fiers (5-2, 3.81 ERA) is scheduled to start for the Astros against A's LHP Sean Manaea (6-4, 4.05). The Mariners wrap up their nine-game homestand with a two-game series against Philadelphia beginning Tuesday. Left-hander James Paxton (5-2, 3.39) is set to face Phillies RHP Aaron Nola (4-5, 4.32).