Shuffled lineup, big home runs lead A’s past Rangers.

Manager Bob Melvin shuffled his lineup Tuesday to, as he explained, take some pressure off a couple of struggling A’s hitters.

In a 103 win over the Rangers, that newlook order found a variety of ways to exert pressure on Texas pitchers.

Five different Oakland hitters drove in runs and six scored as the A’s opened the second half of their schedule by improving to 2110, the American League’s best record.

Matt Olson, batting sixth for the first time this season, singled and hit a tworun homer in his first two atbats. It was an encour

aging sign after Olson’s odd first half: He entered Tuesday tied for third in the AL in homers (nine) and third in walks (21) but batting .164, third lowest among qualified players.

“He’s due regardless,” Melvin said. “Sometimes just a slight move can help you out a little bit.”

Olson said a puzzling aspect of his start is that he’s staying mostly in the strike zone but “missing the pitches I’ve been getting to hit.” Olson lined a changeup from Kyle Gibson up the middle for a single Tuesday and then hit a fastball an estimated 453 feet to rightcenter for his 10th homer.

“I’ve been looking at video and my swing looks really close to when I’m doing well,” Olson said. “Today, I just wanted to be a little freer with my hands and not be as tight . ... I came out and had the good first two atbats and felt really loose.”

Tony Kemp, batting in his usual No. 8 spot, sparked three rallies. Kemp walked and scored from third on a wild pitch in the third inning. In the fifth, he was hit by a pitch and scored on Marcus Semien’s tworun homer. In the seventh, on third base after a single, Kemp got caught in a rundown but used a nifty slide to get back to third and keep the bases loaded for what became a fiverun inning. A Robbie Grossman walk and Mark Canha hitbypitch forced in runs before Stephen Piscotty’s threerun double.

“He had some really good stuff on the bases today,” Melvin said of Kemp. “And just doing a lot of good things whether it’s drawing walks, getting on base, making a play. He’s been a nice find for us.”

Piscotty, moved up to the fifth spot Tuesday, has 25 RBIs in August, equaling his career high in a month. Ramón Laureano, batting .154 in his past 15 games, dropped from the second spot to seventh. Grossman, the A’s onbaseplusslugging leader (.966), hit second.

“We’re just trying to move some guys up in the order ... that are swinging the bat a bit better right now,” Melvin said pregame. “My guess is it won’t be like this for long.”

Starter Sean Manaea allowed only a secondinning RBI single to Isiah KinerFalefa until the fifth, when he plunked Texas catcher Robinson Chirinos with a 94mph fastball. Chirinos was visibly displeased — Gibson had already hit two A’s batters, including Matt Chapman on the ear flap — and umpires warned both dugouts. Texas loaded the bases with help from a Semien error, and Nick Solak lined a twoout, tworun single to make it 53, but Manaea retired Todd Frazier on a flyout to end the inning.

“I thought he was good,” Melvin said. “Pretty similar to last game, (getting) balls on the ground, pitching a little differently, had a good changeup at times . ... At the end of the day, gets a ‘W.’ ”

Manaea, who is 20 in his past two starts after going winless in his first five, said he was locating fastballs to both sides of the plate and had a better feel for his changeup and slider in the middle innings. “Overall, it was great,” he said. “I felt like I was in the driver’s seat the whole time.”

After Manaea exited, T.J. McFarland, Lou Trivino and Jordan Weems combined to extend a 221⁄3inning scoreless streak for the A’s bullpen.

Matt Kawahara covers the A’s for The San Francisco Chronicle. Email: mkawahara@ sfchronicle.com Twitter: @matthewkawahara