José Altuve homered on the first pitch of the game, Yuli Gurriel drove in four runs to back Zack Greinke, and the Houston Astros won for the seventh time in eight games by beating the Oakland Athletics 8-1 on Wednesday night.

Greinke (4-1) struck out eight and didn't walk a batter, allowing one run on four hits over eight impressive innings to win back-to-back starts for the first time this season.

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Houston Astros' Jose Altuve rounds third base after hitting a home run against the Oakland Athletics during the first inning of a baseball game in Oakland, Calif., Wednesday, May 19, 2021. (AP PhotoJeff Chiu)

José Altuve homered on the first pitch of the game, Yuli Gurriel drove in four runs to back Zack Greinke, and the Houston Astros won for the seventh time in eight games by beating the Oakland Athletics 8-1 on Wednesday night.

Oakland Athletics' Frankie Montas pitches against the Houston Astros during the first inning of a baseball game in Oakland, Calif., Wednesday, May 19, 2021. (AP PhotoJeff Chiu)

The Astros pulled back within a half-game of the defending AL West champion A's in the division race — with everybody realizing it's still May and early but fully expecting these two clubs to chase each other down to the end. Houston hasn't led the West since April 8.

Houston Astros' Carlos Correa hits an RBI-single against the Oakland Athletics during the first inning of a baseball game in Oakland, Calif., Wednesday, May 19, 2021. (AP PhotoJeff Chiu)

A’s righty Frankie Montas (5-3) had his three-start winning streak snapped. He allowed two runs and seven hits over five innings, struck out six and walked two.

Oakland Athletics second baseman Jed Lowrie, left, throws to first base after forcing Houston Astros' Myles Straw, right, out at second base on a double play hit into by Martin Maldonado during the sixth inning of a baseball game in Oakland, Calif., Wednesday, May 19, 2021. (AP PhotoJeff Chiu)

“It’s indescribable,” said the 25-year-old Ivey, who grew up in the Dallas suburb of Rowlett as a Rangers fan. “To be making my debut there, I really can’t describe it.”

A trainer, left, checks on Oakland Athletics catcher Sean Murphy (12) during the fourth inning of a baseball game against the Houston Astros in Oakland, Calif., Wednesday, May 19, 2021. (AP PhotoJeff Chiu)

TRAINER’S ROOM

Houston Astros second baseman Jose Altuve cannot field a base hit by Oakland Athletics' Chad Pinder during the second inning of a baseball game in Oakland, Calif., Wednesday, May 19, 2021. (AP PhotoJeff Chiu)

Athletics: RHP Mike Fiers, on the injured list with a sprained elbow, isn't ready to play catch yet. "He hasn’t thrown yet. He’s still doing strengthening stuff," manager Bob Melvin said. “We’re still a ways away with him.” ... LHP A.J. Puk (strained left biceps) is set to pitch an inning with Triple-A Las Vegas on Thursday, while LHP Jesús Luzardo (hairline fracture in his pinkie) will throw with the A's. He is likely to need some innings with Las Vegas before returning, too.

Oakland Athletics' Chad Pinder slides home to score against the Houston Astros during the second inning of a baseball game in Oakland, Calif., Wednesday, May 19, 2021. (AP PhotoJeff Chiu)

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Houston Astros' Zack Greinke pitches against the Oakland Athletics during the first inning of a baseball game in Oakland, Calif., Wednesday, May 19, 2021. (AP PhotoJeff Chiu)

Houston Astros' Zack Greinke pitches against the Oakland Athletics during the first inning of a baseball game in Oakland, Calif., Wednesday, May 19, 2021. (AP PhotoJeff Chiu)

Gurriel hit a pair of two-run doubles among his four hits, Carlos Correa contributed two RBI singles and Michael Brantley also singled home a late run for Houston.

Houston Astros' Jose Altuve rounds third base after hitting a home run against the Oakland Athletics during the first inning of a baseball game in Oakland, Calif., Wednesday, May 19, 2021. (AP PhotoJeff Chiu)

Houston Astros' Jose Altuve rounds third base after hitting a home run against the Oakland Athletics during the first inning of a baseball game in Oakland, Calif., Wednesday, May 19, 2021. (AP PhotoJeff Chiu)

The Astros pulled back within a half-game of the defending AL West champion A's in the division race — with everybody realizing it's still May and early but fully expecting these two clubs to chase each other down to the end. Houston hasn't led the West since April 8.

Sean Murphy had an RBI double in the second for Oakland, coming off its major league-leading fifth walk-off win in a 6-5 victory a night earlier.

Altuve, still getting booed at every chance in Oakland since the Astros' 2017-18 sign-stealing scam was exposed, extended his hitting streak to 13 games. It's his first hitting streak of 12 or more games since a career-best 19-game string during the 2017 World Series championship season.

Oakland Athletics' Frankie Montas pitches against the Houston Astros during the first inning of a baseball game in Oakland, Calif., Wednesday, May 19, 2021. (AP PhotoJeff Chiu)

Oakland Athletics' Frankie Montas pitches against the Houston Astros during the first inning of a baseball game in Oakland, Calif., Wednesday, May 19, 2021. (AP PhotoJeff Chiu)

A’s righty Frankie Montas (5-3) had his three-start winning streak snapped. He allowed two runs and seven hits over five innings, struck out six and walked two.

ROOKIE'S SHOT

Astros right-handed pitching prospect Tyler Ivey has been called up to make his major league debut Friday against Texas.

Houston Astros' Carlos Correa hits an RBI-single against the Oakland Athletics during the first inning of a baseball game in Oakland, Calif., Wednesday, May 19, 2021. (AP PhotoJeff Chiu)

Houston Astros' Carlos Correa hits an RBI-single against the Oakland Athletics during the first inning of a baseball game in Oakland, Calif., Wednesday, May 19, 2021. (AP PhotoJeff Chiu)

“It’s indescribable,” said the 25-year-old Ivey, who grew up in the Dallas suburb of Rowlett as a Rangers fan. “To be making my debut there, I really can’t describe it.”

He’s expecting as many as 50 friends and family members in the stands.

“It’ll be pretty overwhelming. It’ll be quite the experience, for sure,” said Ivey, who also had a short stint as an Astros fan more than 15 years ago.

Oakland Athletics second baseman Jed Lowrie, left, throws to first base after forcing Houston Astros' Myles Straw, right, out at second base on a double play hit into by Martin Maldonado during the sixth inning of a baseball game in Oakland, Calif., Wednesday, May 19, 2021. (AP PhotoJeff Chiu)

Oakland Athletics second baseman Jed Lowrie, left, throws to first base after forcing Houston Astros' Myles Straw, right, out at second base on a double play hit into by Martin Maldonado during the sixth inning of a baseball game in Oakland, Calif., Wednesday, May 19, 2021. (AP PhotoJeff Chiu)

TRAINER’S ROOM

Astros: Manager Dusty Baker remains hopeful of welcoming back third base coach Gary Pettis sometime in June after his absence while undergoing treatment for cancer in Southern California.

"He’s making great strides. He’s hoping sometime next month," Baker said of the 63-year-old Pettis, fighting multiple myeloma. “We miss him. We just pray that he gets healed.”

A trainer, left, checks on Oakland Athletics catcher Sean Murphy (12) during the fourth inning of a baseball game against the Houston Astros in Oakland, Calif., Wednesday, May 19, 2021. (AP PhotoJeff Chiu)

A trainer, left, checks on Oakland Athletics catcher Sean Murphy (12) during the fourth inning of a baseball game against the Houston Astros in Oakland, Calif., Wednesday, May 19, 2021. (AP PhotoJeff Chiu)

Athletics: RHP Mike Fiers, on the injured list with a sprained elbow, isn't ready to play catch yet. "He hasn’t thrown yet. He’s still doing strengthening stuff," manager Bob Melvin said. “We’re still a ways away with him.” ... LHP A.J. Puk (strained left biceps) is set to pitch an inning with Triple-A Las Vegas on Thursday, while LHP Jesús Luzardo (hairline fracture in his pinkie) will throw with the A's. He is likely to need some innings with Las Vegas before returning, too.

UP NEXT

LHP Cole Irvin (3-4, 3.02 ERA) takes the mound for the A's in the series finale looking for his first victory against the Astros after going 0-2 with a 7.45 ERA in two previous matchups, both this year. Houston starts RHP Luis García (1-3, 3.34) as he tries to win consecutive outings for the first time in his career.

Houston Astros second baseman Jose Altuve cannot field a base hit by Oakland Athletics' Chad Pinder during the second inning of a baseball game in Oakland, Calif., Wednesday, May 19, 2021. (AP PhotoJeff Chiu)

Houston Astros second baseman Jose Altuve cannot field a base hit by Oakland Athletics' Chad Pinder during the second inning of a baseball game in Oakland, Calif., Wednesday, May 19, 2021. (AP PhotoJeff Chiu)

More AP MLB: https://apnews.com/hub/mlb and https://twitter.com/AP_Sports

Oakland Athletics' Chad Pinder slides home to score against the Houston Astros during the second inning of a baseball game in Oakland, Calif., Wednesday, May 19, 2021. (AP PhotoJeff Chiu)

Oakland Athletics' Chad Pinder slides home to score against the Houston Astros during the second inning of a baseball game in Oakland, Calif., Wednesday, May 19, 2021. (AP PhotoJeff Chiu)

Houston Astros' Zack Greinke pitches against the Oakland Athletics during the first inning of a baseball game in Oakland, Calif., Wednesday, May 19, 2021. (AP PhotoJeff Chiu)

Houston Astros' Zack Greinke pitches against the Oakland Athletics during the first inning of a baseball game in Oakland, Calif., Wednesday, May 19, 2021. (AP PhotoJeff Chiu)