OAKLAND -- Third baseman Kyle Seager and designated hitter Corey Hart hit back-to-back home runs in the seventh inning Wednesday, and right-hander Felix Hernandez outdueled Jon Lester as the Seattle Mariners came from behind to beat the Oakland A's, 2-1, at the O.co Coliseum.

Designated hitter Adam Dunn hit a solo home run in the fourth inning, giving the A's a 1-0 lead. But in the top of the seventh, the Mariners moved ahead.

Leading off, Seager launched Lester's 3-and-1 fastball into the right field seats for his 22nd home run of the season, matching his career high.

Hart, starting his first game since being activated from the disabled list on Monday, lined Lester's fastball into the left field seats for his fifth home run of the year.

Seager was 3-for-4 and homered for the second straight game.

Hernandez (14-5) allowed one run on three hits over eight innings, continuing his dominance of the A's. He improved to 19-7 for his career against Oakland and 4-0 in five starts this season.

He beat the A's for the sixth straight time at the Coliseum and bounced back from one of his worst starts of the season. He allowed five runs and 10 hits, including four home runs, over seven innings in an 8-3 loss to Washington on Friday.

Mariners closer Fernando Rodney pitched a perfect ninth for his 41st save.

After losing, 6-1, on Monday to the A's, the Mariners won the next two games to capture the three-game series.

Lester (13-10) gave up only two runs on seven hits over eight innings and fell to 0-3 over his last four starts. He won his first three outings for Oakland after being traded by Boston to the A's on July 31.

Dunn snapped a scoreless pitching duel with a towering blast off Hernandez that stayed just inside the right field foul pole with one out in the fourth.

Dunn homered Monday against Seattle in his first at-bat with the A's, one day after being traded by the White Sox to Oakland. He has three career blasts off Hernandez.

Dunn's home run Wednesday was his 22nd of the season and the 462nd of his career, tying him with former A's outfielder Jose Canseco for 34th on baseball's all-time list.

NOTES: A's closer Sean Doolittle (strained right intercostal muscle) played long toss Wednesday as he continued to make solid progress in his recovery. "Felt great," A's manager Bob Melvin said of the left-hander, who has 20 saves this season. "Tomorrow he'll be off, and we'll see where we are with him on Friday. But encouraging to see that he feels as good as he does." Doolittle is eligible to be activated from the disabled list on Monday. ... Athletics CF Coco Crisp (neck strain) missed his fifth straight game Wednesday, but Melvin said he hopes Crisp will return to the lineup Friday against Houston after Oakland's off day Thursday. ... Mariners manager Lloyd McClendon said he will decide Thursday whether to skip struggling RHP Chris Young's start in the rotation Saturday. McClendon watched Young throw a bullpen session before Thursday's game. He said his decision will be based on whether he's convinced that Young is healthy. "That's the only factor that really comes into play," McClendon said. "His bullpen was good, threw the ball good." ... Mariners DH Corey Hart (bruised right knee) was in the lineup for the first time since being activated Monday from the disabled list. "He's healthy," McClendon said. "He swung the bat good down in Triple-A. Corey Hart can be an X-factor for us, particularly against left-handed pitching. It's good to have him back."