OAKLAND (AP) -- Mike Fiers won in his first start at the Coliseum since pitching a no-hitter earlier this month and the Oakland Athletics beat Seattle 6-5 Saturday, sending the Mariners to their fifth straight loss.
Matt Chapman homered and Ramon Laureano doubled in his fifth straight game, matching Miguel Tejada for the Oakland record.
Domingo Santana hit two home runs and Mitch Haniger also connected for Seattle, which has lost eight of nine.
Mariners third baseman Kyle Seager doubled and singled in his season debut after recovering from surgery to repair a tendon in his left hand that he hurt diving for a ball during spring training.
Fiers (4-3) received a warm welcome when introduced before the game, his first at home since throwing a no-hitter against Cincinnati on May 7. He went six innings against Seattle, allowing three runs and five hits.
Blake Treinen gave up Santana's home run in the ninth before finishing for his 10th save in 12 tries.
Yusei Kikuchi (3-2) faced Oakland for the third time in as many different ballparks this season. The Japanese lefty previously pitched against the A's in Tokyo and Seattle, taking a no-decision each time. He was done after 3 1/3 innings, giving up five runs and 10 hits.
Marcus Semien hit an RBI single that broke a 3-all tie in the fourth and Chad Pinder followed with a two-run double. Laureano provided an insurance run with a sacrifice fly in the eighth.
The A's designated veteran right-hander Fernando Rodney — with 582 career appearances over 17 big league seasons — for assignment with his 0-2 record and 9.42 ERA in 17 outings. Manager Bob Melvin said he expects him to land with another club. Oakland selected the contract of Taiwanese left-hander Wei-Chung Wang from Triple-A Las Vegas. He was a non-roster invitee to spring training.
The Mariners optioned infielder Dylan Moore to Triple-A Tacoma after Friday night's game and transferred right-hander Sam Tuivailala to the 60-day injured list.
Mariners: 2B Dee Gordon saw a specialist in Orlando, Florida, on Friday for his bruised right wrist. The Mariners medical staff planned to discuss the injury later Saturday. ... On Friday in Seattle, RHP Felix Hernandez (stiffness in his pitching shoulder) played catch for the first time, throwing from up to 60 feet. "He feels good," manager Scott Servais said.
A's: Right fielder Stephen Piscotty was scratched with a stomach bug.
Mariners: RHP Mike Leake (3-5, 4.73 ERA) beat the A's for his last win May 14. He is 0-2 lifetime with a 3.48 ERA in five starts at the Coliseum.
A's: LHP Brett Anderson (5-3, 4.14) is 8-5 with a 2.38 ERA in 20 matchups with 19 starts for his career vs. Seattle — his most victories against any opponent.
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