SEATTLE (AP) - Once again, the Seattle Mariners didn't put a dent in the other team.

The last-place Mariners were swept for the 11th time this season, with starter Jason Vargas giving up a grand slam to Tyler Flowers and a three-run homer to Dayan Viciedo on Sunday in a 9-3 loss to the Chicago White Sox.

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``We didn't play very well today at all,' manager Eric Wedge said. ``Today was a bad day of baseball for us. We didn't go out there and do what we needed to do offensively or on the mound.'

With the AL starting to see the Mariners' youthful lineup more frequently, Wedge knew it was inevitable that teams would make adjustments on how to approach Seattle's hitters. Now it's on the Mariners to adjust as well.

``It's big league baseball,' Wedge said. ``They're going to attack those holes. Now it's up to these kids to make the adjustments back.'

Gavin Floyd (12-10) blanked the Mariners on just two hits over the first seven innings. Kyle Seager reached on a strikeout to start the eighth as Floyd's wild pitch careened to the backstop, and Josh Bard ended the Mariners' 21-inning scoreless streak with a two-run homer off the foul pole in right field.

But that came way too late after the White Sox roughed up Vargas (7-12).

Viciedo, in his first game since being called up from Triple-A on Saturday to replace injured outfielder Carlos Quentin, singled his first time up and then homered. inning that cleared the fence in right-center field.

Vargas faced Viciedo in two at_bats last season, resulting in a single and a strikeout. Vargas remembered the encounters but didn't think it had anything to do with the outcome of these at_bats.

``I think I faced him a couple times last year, but you don't really need a book when you throw it down the middle,' Vargas said.

With two runners on in the sixth inning, Viciedo drew a walk that loaded the bases. Flowers cleared them with his first career grand slam, a shot into the White Sox bullpen in left field.

``I felt really good today,' Vargas said. ``Missed that spot in the third inning and he made me pay for it. The grand slam was a cutter in where I wanted it. I didn't feel like I was in trouble and I was throwing the ball well and was going to be able to get out of that inning. A team like that, built for hitting home runs, can make you pay when you've got runners on base.'

Gordon Beckham and Juan Pierre followed with a pair of singles to chase Vargas, and Brent Lillibridge and Konerko each singled off reliever Josh Lueke to drive in a pair and give the White Sox a 9-0 lead.

Singles from Ichiro Suzuki and Franklin Gutierrez forced Floyd from the game. After a single by Dustin Ackley loaded the bases, Will Ohman struck out Casper Wells and got Adam Kennedy to line out.

Bard added an RBI groundout in the ninth.

NOTES: Mariners 1B Justin Smoak is expected to begin a rehab assignment on Monday with Triple-A Tacoma. Smoak broke his nose when a groundball caught him in the face. He was placed on the 15-day disabled list on August 13. ... The sweep was the first at Safeco Field for the White Sox and first in Seattle since July 30-August 1, 1993. ... Flowers' slam was the first of the year for Chicago. Konerko had the last grand slam against Boston on Sept. 30, 2010. ... Chicago heads home to begin a three-game series with the Minnesota Twins. Mark Buehrle (10-6) will face Kevin Slowey (0-2) in the series opener on Monday. ... Seattle will open a four-game set with the Los Angeles Angels on Monday with Blake Beavan (3-4) taking the mound against Joel Pineiro (5-6).