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The Dodgers’ August woes followed them into the first day of September.

Roster expansion, returning three players from the injured list, the mental relief of turning the calendar page — none of that gave the Dodgers the boost they needed against the Cardinals on Tuesday.

Instead, the Dodgers lost 13-8 to a team that entered the day 4 ½ games out of the last National League wild-card spot.

“I just think tonight we just got behind the eight ball,” manager Dave Roberts said.

During the Dodgers’ past seven series (following a high-scoring trip to Chicago), their rotation has recorded a top-five ERA (2.97) in the majors. But on Tuesday, left-hander Eric Lauer coughed up seven runs in three innings.

Dodgers second baseman Alex Freeland chases the ball as the Cardinals’ Nathan Church hits an RBI in the third inning Tuesday at Dodger Stadium.

(Robert Gauthier/Los Angeles Times)

It was a personal outlier as well in Lauer’s time with the Dodgers. Lauer had given up more than three runs in just two other outings since the Dodgers acquired him from the Blue Jays in mid-May, and Tuesday marked his shortest start.

“I felt good warming up, felt good in the bullpen, then got out there and kind of just lost it,” Lauer said. “And you know it’s one of those things where you try to make adjustments and you try to work on things between, and I think I might have been just tinkering a little too much in between and getting outside of myself. So I think really just focusing on what I do well and repeating that and not trying to get too fancy and getting back to the basics is really all I can do.”

The Dodgers had briefly moved Lauer from the rotation into the bullpen, but he reclaimed his starting role when right-hander Roki Sasaki landed on the IL last week with a blister on his right middle finger.

Lauer’s start Tuesday began to go downhill in the second inning when he gave up back-to-back solo homers to Ramón Urias and Thomas Saggese with two outs.

Those two runs could have been quickly forgotten if Lauer had gotten back on track. The next inning, however, he surrendered five runs as the Cardinals kept chipping away with five singles, a hit batter, a walk and a sacrifice fly.

The Dodgers struck back in the bottom half of the inning — but not exactly with authority.

Mookie Betts’ bases-clearing double was assisted by a Cardinals defensive miscue. Right fielder Jordan Walker and second baseman José Fermín both raced after Betts’ shallow fly. As Fermín dashed back, Walker slid to attempt the catch — and took out Fermín’s feet from under him.

The ball fell to the ground. With two outs, Dodgers baserunners were going on contact and all three crossed the plate before Cardinals first baseman Alec Burleson could retrieve the ball and throw it.

Betts’ bat stayed hot. And he contributed another RBI double in the fifth — this one smoked up the left-field line to drive in one run. But it didn’t do much to put a dent in the Cardinals’ lead.

The Cardinals continued to tack on against the Dodgers’ bullpen, powered by three more home runs, off right-hander Seth Halvorsen, lefty Alex Vesia and lefty Justin Wrobleski, fresh off the injured list.

Dodgers utility player Kiké Hernández pitches during the ninth inning of a blowout loss to the Cardinals at Dodger Stadium on Tuesday.

(Robert Gauthier/Los Angeles Times)

Catcher Will Smith, who the Dodgers also activated from the IL Tuesday, put the ball in the air in his first four at-bats and was finally rewarded in the seventh inning with an RBI double. He drove in another run in the ninth, grounding into a fielder’s choice with the bases loaded, as part of a three-run last-ditch rally.

“I think that there were some positives with the at-bats,” Roberts said. “I liked some of the swings. I like taking walks when given to us. I like being able to push and runs across.”

All four players who the Dodgers activated on Tuesday appeared in the game. In addition to Smith and Wrobleski, second baseman Alex Freeland (recalled from triple A) started the game, and Dalton Rushing (reinstated from the IL) struck out in his lone pinch-hit at-bat. Rushing will provide a left-handed bat off the bench until he’s graduated from his throwing program and built up on the defensive side.

The score was so lopsided by the ninth inning that utility player Kiké Hernández took the mound to finish the game — but without his signature pitching helmet.

Zack Wheeler gave up one run in six strong innings, Edmundo Sosa hit a tiebreaking homer in the seventh and the visiting Philadelphia Phillies completed a three-game sweep with a 5-2 win over the Angels on Sunday.

Sosa, whose pinch-hit grand slam in the ninth gave Philadelphia a 5-3 win Friday night, led off the seventh with a solo shot off Angels starter Yusei Kikuchi (0-5) to give the Phillies a 2-1 lead.

The Phillies added two insurance runs in the eighth on Luis Arraez’s pinch-hit sacrifice fly and Brandon Marsh’s pinch-hit RBI single for a 4-1 lead. Bryce Harper added an RBI double in the ninth for a 5-1 lead.

Alex McFarlane threw a scoreless seventh and Orion Kerkering gave up a run on Mike Trout’s ninth-inning RBI double while recording the final four outs for his second save.

The Phillies won for the 13th time in 15 games. The Angels have lost seven straight, matching their longest losing streak of the season.

Wheeler (11-5) allowed four hits, struck out six and walked three to outduel Kikuchi, who gave up two runs and six hits in seven innings, striking out six and walking one.

Wheeler went 0-3 with an 8.38 ERA in his previous four games and appeared headed for another shaky start when he walked Wade Meckler, hit Trout with a pitch and gave up a single to Vaughn Grissom to load the bases with no outs in the first.

But Wheeler got Moisés Ballesteros to ground into a run-scoring double play and struck out Christian Moore on three pitches to start a 5⅓-inning stretch during which he retired 16 of 19 batters.

J.T. Realmuto hit a solo homer in the third to tie it at 1 for the Phillies.

Before the game, the Angels placed rookie right-hander George Klassen (2-2, 3.67 ERA) on the 15-day injured list because of left lower-back inflammation.

Up next: Angels: RHP Walbert Ureña (8-9, 2.94) will oppose Yankees RHP Elmer Rodriguez (0-2, 4.70) Monday night in Anaheim.

Pinch-hitter Edmundo Sosa hit his first career grand slam with two outs in the ninth inning, and the Philadelphia Phillies roared back for a 5-3 victory over the Angels on Friday night.

Sosa connected just two batters after Wade Meckler reached deep into the right field stands to rob Bryson Stott of a three-run homer.

After J.T. Realmuto drew a walk that loaded the bases and chased shaky closer Ben Joyce (0-2), Sosa crushed a low changeup from Sammy Peralta 404 feet to center, far beyond Mike Trout‘s reach.

Alex McFarlane (4-1) pitched the eighth for the Phillies. Jonathan Bowlan got the ninth instead of closer Jhoan Duran, and he put two Angels on base before he struck out Adam Frazier to finish his second save.

Bryce Harper extended his on-base streak to a career-high 30 games with a bunt single in the fourth for Philadelphia, which improved to 2-2 on its nine-game West Coast trip. The Phillies also moved one game behind the Cubs for the top NL wild-card spot.

Reid Detmers yielded one run and eight hits over six resilient innings, but the AL-worst Angels lost their fifth straight with yet another bullpen implosion.

After Alec Bohm and Justin Crawford reached base without a hit off Joyce, Meckler appeared to save the game for the Angels with his spectacular running catch on Stott’s sinking fly, putting his body onto the waist-high wall of the short porch and sticking his glove in among the fans.

Instead, Sosa connected for the Phillies’ first go-ahead grand slam with two outs in the ninth inning since Shane Victorino did it in 2009.

Meckler drove in a run on the first pitch he saw in his return from the concussion injured list during a three-run first inning for the Angels, who managed just three singles — one after the first.

Andrew Painter recovered nicely from that 28-pitch first in which he threw two wild pitches that brought home Trout and Meckler, facing the minimum 15 batters during five hitless innings afterward.

Up next: Phillies All-Star Cristopher Sánchez (16-4, 2.62 ERA) takes the mound Saturday against the Angels’ Ryan Johnson (3-7, 5.75 ERA).