It marked the first time the Mariners have ever been swept in a homestand of more than four games.
Seattle falls to 59-73, Rangers climb to 78-55 — a season-high 23 games above .500.
Felix Hernandez (12-8) gets the loss in his shortest outing of the season (three innings).
“It’s not just all Felix,” manager Eric Wedge said. “He had a bad day today – it always starts with your starting pitching – but it still has to go back to every area of our club. I mean, I don’t like the way we’re playing. I didn’t like the way we played this entire homestand. I thought we showed signs of some fights, and better ABs and better play; but overall we’re still pretty sloppy as a ball club and not executing, whether it be offensively or defensively. And there’s no excuse for that at this point in time in the year. These guys are going to have to find another gear and pick themselves up by the bootstraps and stop the bleeding and get back on track. We’ve got 30 games left.”
Next, Mariners head off on eight game road trip to Houston and Kansas City.