If the Red Sox were looking to make a statement in regards to how they should be viewed as a Wild Card contender on Monday, they certainly came up short of doing that against a team hot on their trail in the Mariners.

Boston fell to Seattle, 5-4, in the opening contest of a three-game series at T-Mobile Park, marking their sixth loss in their last eight games.

Eduardo Rodriguez, making his 28th start of the season for the Sox, bounced back from a rough outing in his last time out against the Rays by surrendering just two runs — only one of which was earned — on six hits and one walk to go along with six strikeouts on the night.

That said, Rodriguez on Monday did not get off to the best starts, as he gave up a double and single to the first two batters he faced (J.P. Crawford and Mitch Haniger) before allowing the Mariners to take an early 1-0 lead on a run-scoring double play from Ty France in the first inning.

The left-hander had to battle his way through the bottom of the second as well, with Abraham Toro drawing a leadoff walk off him and Luis Torrens ripping a hard-hit single to right field as well as advancing up to second base when Hunter Renfroe booted the ball.

Tom Murphy then doubled his side’s advantage with an RBI groundout, but Rodriguez was ultimately able to settle in — and he did so while getting some help from the Red Sox lineup.

Mariners starter Logan Gilbert had nearly got through Boston’s batting order for the first time without giving up a hit before No. 9 hitter Jose Iglesias altered those plans.

With one out and the bases empty in the top half of the third, Iglesias clubbed a 386-foot solo shot off Gilbert for his ninth home run of the season and his first in a Red Sox uniform in more than eight years.

Fast forward to the fifth, after Alex Verdugo and Christian Vazquez each laced a pair of singles to put runners at the corners with one out, Iglesias came through once more, this time by plating Verdugo on a blooper of an RBI single that knotted things up at two runs apiece.

While Iglesias and Co. were grinding away at the plate, Rodriguez was dealing on the mound, as he ended his day by retiring 12 of the final 16 batters he faced following a 32-pitch second inning.

Finishing with a final pitch count of 107 (74 strikes), his second-highest pitch total of the year, the 28-year-old hurler did not factor into the decision on Monday, though he did lower his ERA on the season to 5.00.

In relief of Rodriguez, right-hander Ryan Brasier got the first call from Red Sox manager Alex Cora out of the Boston bullpen, and it appeared he was well on his way to a 1-2-3 seventh inning.

After needing all of five pitches to record the first two outs of the seventh, Brasier induced a relatively-weak grounder off the bat of the pinch-hitting Jake Bauers that was hit in the direction of Kyle Schwarber at first base.

Schwarber, however, misplayed the ball and was charged with a fielding error, thus allowing Bauers to reach first base safely.

The Mariners made the Sox pay dearly for yet another defensive miscue, as Crawford singled to put runners at first and second before Haniger drilled a go-ahead three-run homer 363 feet to left field. Austin Davis had to get the last out of the seventh after his side had suddenly found themselves in a 5-2 hole.

Despite the three-run deficit, the Boston bats did not go away in the eighth, with both Xander Bogaerts and Rafael Devers crushed a pair of back-to-back solo shots off Seattle reliever off Paul Sewald to make it a 5-4 game.

After Kaleb Ort (making his major-league debut) and Josh Taylor combined to toss a scoreless eighth inning, though, Mariners closer Drew Steckenrider slammed the door shut on the Red Sox in the ninth.

Verdugo fanned on a foul tip into the catcher’s mitt, Renfroe was called out on strikes, and Vazquez flew out to center field for the third and final out, as 2-1 would go on to be Monday’s final score in favor of the Mariners.

With the loss, the Red Sox fall to 81-65 on the season while also relinquishing the top American League Wild Card spot to the red-hot Blue Jays and moving into a virtual tie with the Yankees for the second and final spot.

Next up: Eovaldi vs. Anderson

The Red Sox will turn to right-hander Nathan Eovaldi on Tuesday as they look to put an end to this two-game skid. The Mariners will counter with left-hander Tyler Anderson.

First pitch Tuesday night is scheduled for 10:10 p.m. eastern time on NESN and MLB Network.

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