HOUSTON -- Working closely with Framber Valdez, Houston Astros catcher Martin Maldonado has enjoyed a front-row seat for the journey that has turned the left-hander into one of baseball's top pitchers in his fifth season.

"It is a lot of calm, a lot of confidence and a lot of maturity from him," Maldonado said. "He knows what he can do good. Listening more and taking pride in the work, less emotional on the mound. So I've seen a lot of stuff going into (his growth).``

Valdez set a major league single-season record with his 25th straight quality start, and Yordan Alvarez and Maldonado had four RBIs apiece in the Astros' 11-2 victory over the Oakland Athletics on Sunday.

Valdez's streak is tied for the third-longest all time across multiple seasons, according to ESPN Stats & Information research.

Alvarez, who ranks second in the AL with 37 homers, drove in three runs with a double in Houston's five-run third inning. He tacked on an RBI double in the sixth.

Alvarez extended his hitting streak to a season-high nine games. He piled up nine hits, four homers and nine RBIs in the series, helping Houston take three of four.

Valdez (16-5) allowed two runs and four hits in six innings to pass Jacob deGrom (24 in 2018) for the most consecutive quality starts in a single season in MLB history. Valdez, who threw his first career shutout in his last start, is 15-4 during his streak, which began April 25.

"It's one of those things that just goes down on your resume, and to be able to have a record like that does mean a lot for me," he said through a translator.

Valdez's career-high 16 wins rank second in the AL behind teammate Justin Verlander (17) and his 2.57 ERA is sixth.

Manager Dusty Baker raved about the consistency Valdez has brought to the team this season.

"That's a remarkable streak," Baker said. "There have been some some great pitchers that he surpassed by breaking this record and I'm just glad that he accomplished it and we won the ballgame."

Maldonado tied a career high with his first four-hit game since 2015, and he scored four times for the first time in his 12-year career. He singled three times before smacking a three-run homer to left with two outs in the seventh.

The Associated Press contributed to this report.