The Astros let one lead get away in the fourth inning, then another in the fifth and another in the seventh. With a tired bullpen unable to throw strikes or stop the scoring, this one ended how Houston might have guessed it would.

In the bottom of the seventh inning, the Angels scored three runs for a walk-off 10-9 victory over the Astros in Game 1 of Saturday's seven-inning doubleheader at Angel Stadium.

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Halos rookie Jo Adell ended it with a two-run single off right-hander Enoli Paredes, the fourth and final reliever utilized by Astros manager Dusty Baker. Los Angeles or Houston (or both) scored in all seven innings, and the Astros had taken a 9-7 lead in the top of the seventh with a three-run rally, capped by Martín Maldonado's two-run single. But the Angels had the final comeback with a three-run rally of their own in the bottom of the inning.

It was a day that began with the Astros placing second baseman Jose Altuve on the 10-day injured list due to a sprained right knee. Shortly after that, Baker said he didn’t have four relievers -- Ryan Pressly, Andre Scrubb, Luis Garcia and Brooks Raley -- available after needing 10 1/3 innings from his bullpen in Friday's loss.

What Baker needed most in Game 1 was innings from starter Brandon Bielak. He didn’t get them, however, as Bielak couldn't get out of the fourth, allowing four runs in 3 2/3 innings. In the third, Bielak allowed Mike Trout's 300th career home run. An inning later, Baker had to go back to his bullpen.

“You don’t feel too badly when it’s Mike Trout, because you know he’s going to get you,” Baker said. “This guy isn’t called the best player in the world for nothing.”

Baker’s four relievers allowed six runs in 2 2/3 innings. They allowed six hits, but it was their three walks that bothered Baker afterward.

“That’s what happens when you're trying to piecemeal the closer by committee,” Baker said. “It usually doesn't work. It’s real troublesome, because we're not making them earn it. You’ve got a young staff, and you hope that they throw strikes more often than not. We’re having trouble throwing the ball out over the plate. The walks really, really drive you crazy.”

Bielak has struggled recently, allowing 15 runs (14 earned) in 5 2/3 innings over his past three starts. He breezed through the first two innings, but things unraveled from there.

“I was falling behind, 1-0, 2-0, a lot,” Bielak said. “I’ve got to go out there and trust the guys behind me.”

Bielak went 10 days between outings, but he declined to use that as an excuse.

“It was probably tough on me, mentally. We had some games cancelled," Bielak said. "I was just hoping to make sure I was ready.”