David Ortiz was the standout performer for the Red Sox, launching career homer No. 521 to tie Hall of Famers Ted WIlliams, Willie McCovey and Frank Thomas for 19th on the all-time list. Ortiz is hitting .344 with 18 homers and 59 RBIs in what is expected to be his final season.
With a steady stream of offense at his back, Hisashi Iwakuma earned the win for the Mariners, allowing nine hits and four runs over seven innings.
It was a forgettable night for Elias, who made his first start for the Red Sox and was hit hard by his former team, giving up seven hits and seven runs over four innings.