Matt Chapman hit a home run and Mike Fiers pitched six quality innings as the Oakland Athletics defeated the visiting Seattle Mariners 6-5 on Saturday afternoon for their eighth consecutive victory.

Domingo Santana hit two solo homers and Mitch Haniger had one for Seattle, which lost its fifth in a row.

Chapman lined a solo shot over the wall in right-center field in the first inning against Mariners left-hander Yusei Kikuchi (3-2).

Seattle twice tied the score after being down a run, but the Athletics never trailed.

Fiers (4-3), a right-hander who threw his second career no-hitter earlier this month, allowed three runs on five hits in six innings. He didn't walk a batter and struck out three.

Oakland's Ryan Buchter and Lou Trivino combined for two scoreless innings of relief, allowing one hit and striking out four. Blake Treinen overcame a shaky ninth for his 10th save of the season.

With one out, Santana homered to center field. Kyle Seager, making his season debut after suffering a hand injury in spring training, then doubled to left. An out later, J.P. Crawford doubled off the base on the wall in left, scoring Seager to pull the Mariners within a run. Treinen got rookie Shed Long to fly out to right field to end the game.

The Mariners tied the score at 1-1 in the third on Haniger's run-scoring single to left.

Oakland regained the lead in the bottom of the inning on an RBI single by Jurickson Profar.

Seattle tied it at 2-2 in the top of the fourth on Santana's homer to left-center field.

The A's scored three times in the bottom of the inning to take the lead for good.

Ramon Laureano led off with a line-drive double to right field. An out later Josh Phegley was hit by a pitch. Marcus Semien lined a run-scoring single to left, with Phegley advancing to third on Santana's fielding error. Chad Pinder then lined a two-run double into the left-field corner, ending Kikuchi's afternoon.

Kikuchi, who suffered his first loss since April 15, lasted just 3 1/3 innings. He allowed five runs (four earned) on 10 hits, with one walk and one strikeout.

The A's scored what turned out to be the deciding run on Laureano's sacrifice fly in the eighth.

--Field Level Media