The Mariners had their moments on Sunday at Petco Park, but in the end, it was the Padres throwing the party, as San Diego clinched a postseason berth with a 7-4 victory in 11 innings.

Dylan Moore continued his breakout campaign with a two-run homer that tied the game at 3-3 in the eighth, center fielder Kyle Lewis made another excellent catch in center field, Justin Dunn didn’t allow a hit for 5 2/3 innings and Evan White and Tim Lopes combined to spoil an otherwise impeccable afternoon by Padres standout starter Dinelson Lamet.

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Yet the Padres won in extra innings with three runs (one earned) off reliever Casey Sadler after starting the 11th with the obligatory runner on second base. Both teams scored once in the 10th. San Diego was playing as the visiting team because the series had been shifted from Seattle due to smoke from the West Coast wildfires heading into the weekend.

“That was a little bit of everything,” Mariners manager Scott Servais said. “Some really good pitching, some big home runs, extra-innings drama. It was a heck of an effort.”

But the loss left the Mariners 23-30 heading into the final week of the regular season and four games back of Houston for the No. 2 spot in the American League West, with the Astros coming to Seattle for a three-game series starting Monday. The Mariners are also four back of Toronto for the final AL Wild Card berth after both the Blue Jays and Astros won on Sunday.

While the Padres’ path to the postseason is now assured, the Mariners’ long-shot chances dimmed considerably. Seattle will need to sweep the Astros just to close that gap to one game before Houston closes out with four games at last-place Texas. With the Astros already owning the tiebreaker advantage over Seattle -- with a 6-1 record in head-to-head games -- the Mariners are essentially five back with seven to play.

They might have a better shot to run down the Blue Jays, who snapped a six-game skid with Taijuan Walker beating the Phillies on Sunday. Toronto still has four games left against the red-hot Yankees and three against Baltimore, and Seattle would own the tie-breaker of better intradivision record should they catch the Blue Jays.

But either scenario requires getting on a roll in the final week, starting against an Astros team that has struggled of late. That series will close out what originally was scheduled as a 10-game homestand at T-Mobile Park.

“We are ready to go back home, no question about that,” Servais said. “I give our guys a ton of credit. I didn’t hear any complaining about anything. We played the hand we were dealt. I can’t fault our effort. These are meaningful games for us and we’re learning a lot from them. And we’ve got some more meaningful coming up against the Astros.”

Dunn is Example A of how the young Mariners are learning from these tough games against quality opponents. The 24-year-old was one pitch away from turning a 1-0 lead over to the bullpen when he surrendered a three-run homer by veteran Wil Myers on a 2-2 slider left over the middle of the plate on his career-high 106th pitch.

The rookie right-hander wishes he could have that one pitch back, but he appreciates Servais letting him try to fight his way through it.

“I’m glad he kind of took the training wheels off and is letting us learn,” Dunn said. “It stings right now, but this situation will come up again in my career and hopefully next time I'll be able to make the pitch and having this experience will help.”

The Padres had some hard-hit balls early off Dunn, but Lewis hauled in Fernando Tatis Jr.’s 109-mph line drive over his head in center in the first to set the tone and the rookie struck out six to help his cause as well.

The Mariners didn’t have a hit against Lamet until the fifth, when White laced a two-out single and then scored from first on Lopes’ double to left. But that was the only damage done in six innings against Lamet, who is 4-1 with a 2.07 ERA in 11 starts and lining up to be the Padres’ likely No. 1 starter when the postseason begins.

Moore tied the game with his eighth home run of the year and nearly won it with a ground-rule double that hopped the fence in the 10th before being stranded at second. Seeing San Diego clinch provided motivation.

“You can always learn from games like this,” said Moore. “You want to fight to the end, no matter what. It sucks to come out on the losing end, but there’s a lot of fight in this team.”