OAKLAND -- When the A's pitching staff, which has allowed the most runs in the Majors, clashed with the hot-hitting Rangers' lineup, whose 6.4 runs per game lead all MLB offenses, there were bound to be some fireworks.

As Texas took two of the first three games against Oakland, most of the scoring occurred in one- or two-run frames. Manager Bruce Bochy kept in mind that close games can flip in an instant -- so while his team was well-positioned to take the series, the pressure was high as a big inning continued to elude the Rangers.

That is, until late in the game on Sunday afternoon. The club finally put together a Texas-sized frame, scoring eight runs in the eighth inning of the Mother's Day matinee at the Coliseum to cruise past the A's, 11-3.

The game was tied at three-all after Jonathan Hernández, pitching in relief of starter Andrew Heaney, served up a two-run homer to A's catcher Shea Langeliers. The Rangers wasted no time in responding, batting around in the top of the eighth and compiling the club's largest road inning since Texas' eight-run 11th in Seattle on Aug. 8, 2015.

• Why the Rangers' hot start is for real

Adolis García led off the frame with a double, and fittingly, he was the one to cap the barrage when he hammered a grand slam off A's right-hander Zach Neal. His 10th round-tripper -- and second grand slam -- this season extended his MLB-best RBI total to 42.

"My mentality was to get on base," García said in Spanish through a team interpreter. "Do whatever I could to get on base so we could score runs and help the team win."

If it looked like there was no doubt when García unleashed on that pitch, that's because there wasn't. He later said he had been looking for that exact offering from Neal, and as a result, he was able to square it up.

"I'm very lucky to do that," he said.

While putting together that big eighth inning proved key for Texas, preventing a big inning may have been even more important. Heaney, who got a no-decision after striking out nine over six innings of one-run ball, helped his own cause with a critical play in the bottom of the fifth.

With the bases loaded and nobody out, Heaney got Esteury Ruiz -- a thorn in the Rangers' side throughout the four-game set -- to hit a slow tapper toward the mound. The Texas lefty grabbed the ball barehanded and flipped it to Jonah Heim to get the forceout at home. Heim then fired the ball to first base to complete the unconventional 1-2-3 double play.

"We were in a fairly tight ballgame at that point," Bochy said. "To get a double play with the speed guy -- that was a turning point in the game, I thought."

"Not controlling the three hitters before is what puts you in those situations," said Heaney, who thought it was the first time he had started a double play on a barehanded grab. "I'm really glad that I got that ball back to me."

The Rangers are happy to be homeward bound after their 10-game, three-city road trip, all within the division. After going 7-3 against Los Angeles, Seattle and Oakland on this trip, Texas is a perfect 5-0 in American League West series play this season.

Nearly a quarter of the way through the 2023 campaign, the Rangers are 10 games over .500. Owning a 25-15 record, Texas is off to its best start through 40 games since 2013, when the club began the season by going 26-14.

For Bochy, the hot start is in line with the high expectations he carried into his new job.

"We had a couple of injuries I didn't expect," the Rangers' skipper said. "But the way they're playing now, I'm not surprised at all."

As if the team hasn't been excelling on both sides of the ball, there are reinforcements on the way. Corey Seager is likely to return during the upcoming homestand, and Jacob deGrom will bolster a pitching staff that has thrived without its ace when he fully recovers from his right elbow inflammation.

"There's a lot of talent in this clubhouse," Robbie Grossman, who went 3-for-5 with a two-run homer, said. "It's going to be a fun summer in Dallas."