The Mariners could secure a playoff berth as soon as tomorrow.
The helicopter was on a routine flight training west of Joint Base Lewis-McChord, according to the U.S. Army Special Operations Command.
The Astros never led in the series and went 2 for 20 with runners in scoring position.
The Seahawks visit Arizona on Thursday.
The Mariners begin their pivotal series in Houston with RHP Bryan Woo (14-7, 3.02 ERA) on the mound Friday night.
The teams complete their three-game series on Thursday.
Cal Raleigh needs one more home run to pass Ken Griffey Jr. for the Mariners’ single-season record.
The Storm will play at Las Vegas on Thursday for a spot in the WNBA semifinals.
Mariners RHP Bryce Miller (4-5, 5.59 ERA) gets the start Wednesday night after striking out a career-high 11 in his last start against the Angels.
The M’s are seeking their 10th straight win tonight in Kansas City.