Houston, TX (Sports Network) - Michael Saunders' go-ahead two-run double in the seventh inning was the deciding blow, as the Seattle Mariners overcame a non-traditional no-hit bid from Houston's Erik Bedard to post a 4-2 victory in the second edition of a three-game set.

Bedard (3-7) held a 2-0 lead after five innings. However, he walked Saunders and Brad Miller with one out in the sixth, then a passed ball by Astros catcher Jason Castro with Nick Franklin at the plate advanced both into scoring position before Franklin's fly to center brought across Seattle's first run. Miller scored on another passed ball, but after Raul Ibanez walked, Kendrys Morales flied out to keep it 2-2.

The left-hander exited after issuing a one-out walk to Justin Smoak in the seventh, and the bullpen didn't hold up its end of the bargain. Jose Cisnero fanned Dustin Ackley, but walked Mike Zunino ahead of the deciding hit from Saunders which put Seattle ahead by a 4-2 count.

It was the Mariners' only hit of the night.

"That's the oddest win I've ever been a part of," Saunders said. "To score two runs on no hits and no errors, I don't remember the last time that happened. We're just grinding out at-bats."

Bedard's final line: 6 1/3 innings, no hits, three runs -- one earned -- five walks and 10 strikeouts.

"It's tough to take, but I battled for six innings and kept the team in the ballgame," Bedard said. "It was a grind later on."

Counterpart Hisashi Iwakuma (9-4) worked seven full frames, allowing seven hits and two runs while fanning seven with two walks. Tom Wilhelmsen picked up his second save in as many games and 21st of the year with a scoreless ninth.

The Mariners extended their season-high win streak to five in a row.

Matt Dominguez finished with two hits and scored once, while Castro and Jose Altuve knocked in a run each for the Astros, who have lost four straight games.

Both hurlers were locked in a scoreless duel through the first 4 1/2 innings, but Houston finally repaid Bedard's effort in the fifth by scratching out the game's first runs.

Dominguez singled and Jake Elmore doubled to begin Houston's half of the frame, and after Carlos Pena fouled out, Altuve's deep fly to right scored Dominguez. Elmore then came in after Miller was slow to throw to first on a Castro grounder.