Jose Altuve and Yuli Gurriel hit grand slams as the Houston Astros defeated the host Mariners 10-6 Friday night, snapping Seattle’s six-game winning streak.

Scott Servais wouldn’t take credit for it. And he wouldn’t share who actually came up with the concept. But when the Mariners manager was asked about his team’s relentless approach at the plate and its ability to torment starting pitchers, he talked about an observation made by someone in the baseball operations department.

Daniel Vogelbach hit a home run in the 10th inning as the Mariners beat the Kansas City Royals on Thursday afternoon for their sixth straight victory.

The Seattle Mariners became the first major league team to homer in each of its first 15 games when Dee Gordon connected in the sixth inning, then beat the Kansas City Royals 7-6.

The Mariners went into Major League Baseball’s record books thanks to the home-run power of Dee Gordon.

Mitch Haniger hit a tiebreaking homer with two outs in the ninth inning, lifting the Seattle Mariners over the Royals 6-5 after Whit Merrifield extended his hitting streak to a Kansas City-record 31 games. Merrifield’s RBI bunt single in the seventh tied it at 5 and moved him past Hall of Famer George Brett for the Royals mark. Haniger took Brad Boxberger deep, lifting Seattle to 12-2 following an offseason roster overhaul.

Mitch Haniger hit a tiebreaking home run with two outs in the top of the ninth inning as the Seattle Mariners edged the host Kansas City Royals 6-5 Wednesday night for their fifth consecutive victory.

Dee Gordon got three hits and drove in two runs as the high-scoring Seattle Mariners extended baseball’s best record with a 6-3 victory over the Kansas City Royals.

Jay Bruce homered for the third consecutive game (the second time he’s done so this season, no less) and left-hander Marco Gonzales pitched six strong innings to lead the Mariners to a 6-3 victory against the host Kansas City Royals on Tuesday night.

Edwin Encarnacion hit two home runs in the sixth inning, becoming the fifth player to do so twice in a career, as the Mariners defeated the host Kansas City Royals 13-5 Monday night.

Seattle Mariners slugger Edwin Encarnacion homered twice in the sixth inning against the Kansas City Royals on Monday night, becoming the fifth player to do it twice in a career.