SEATTLE (Interstat) — The Athletics overcame an early three-run deficit with a persistent offensive attack, defeating the Seattle Mariners 6-4 on Monday night at T-Mobile Park to open a three-game series.

A crowd of 20,203 watched as the Mariners jumped ahead early before the Athletics methodically chipped away and ultimately seized control with a three-run eighth inning.

Seattle struck first against starter J.T. Ginn. Cal Raleigh launched a solo home run to left-center field in the first inning, his third of the season. Julio Rodríguez followed with a single and scored on an RBI double by Josh Naylor to give the Mariners a 2-0 lead. They extended it to 3-0 in the second when Dominic Canzone hit a solo shot to right-center, his third homer.

Oakland began its comeback in the fourth. Designated hitter Carlos Cortes led off the inning by driving a fly ball over the right-field wall for his second home run of the year, cutting the deficit to 3-1.

The Athletics then took the lead with a powerful sixth inning against Seattle reliever Casey Legumina. Nick Kurtz led off with a towering homer to center field, his third of the season. On the very next pitch, Shea Langeliers followed suit, crushing his seventh home run to center to tie the game at 3-3. The back-to-back blasts energized the dugout and chased Legumina from the game.

The most important sequence of the game came in the top of the eighth inning, with the score still tied. Tyler Soderstrom sparked the rally with a leadoff double. Jacob Wilson followed with a single, moving Soderstrom to third, and Jeff McNeil drew a walk to load the bases with no outs. Max Muncy then delivered a sacrifice fly to right field, scoring Soderstrom to give its first lead at 4-3. Lawrence Butler provided the decisive blow, lining a two-run single to right field that scored both Wilson and McNeil, extending the Athletics’ advantage to 6-3.

Seattle threatened in the bottom of the eighth, putting runners on the corners with one out, but Hogan Harris entered from the bullpen and struck out Randy Arozarena before getting Rob Refsnyder to fly out to end the threat. Harris earned the win, improving to 2-0 after recording 1 2/3 scoreless innings of relief.

The Mariners mounted a final rally in the ninth against Athletics closer Joel Kuhnel. Cole Young singled and scored on an RBI double by Leo Rivas, making it 6-4. Kuhnel, however, retired J.P. Crawford and Cal Raleigh to strand the tying run at the plate and secure his fourth save of the season.

Legumina took the loss for Seattle, falling to 0-1 after surrendering the two sixth-inning home runs.

Cortes led Oakland’s 13-hit attack, going 4 for 5 with a home run and an RBI. Butler contributed two hits and two crucial RBIs. For Seattle, Naylor went 3 for 4 with an RBI, while Canzone added two hits, including his homer.

On the mound, Athletics starter J.T. Ginn allowed three runs on six hits over 5 1/3 innings, striking out six. Mariners starter Emerson Hancock gave up three runs on seven hits in five innings of work.

The victory improved Oakland’s record to 12-11, while Seattle fell to 10-14. The two teams will continue their series on Tuesday night.

The game, which lasted 2 hours and 42 minutes, finished under the projected over/under line of 7.5 runs despite the teams combining for 10 runs. The Athletics’ win defied pregame projections that favored the Mariners, who had been installed as 1.5-run favorites.

Oakland arrived in Seattle after splitting a four-game series with the Chicago White Sox, while the Mariners were coming off a series win against the Texas Rangers.