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Luis Castillo allowed a season-high tying five runs in five innings.
The decision will remove almost 15 billion plastic air pillows from use every year.
Bryan Woo (3-1) made his first start since June 6 at Oakland, giving up three runs in four innings.
The Mariners beat the Cleveland Guardians 8-5 in the first of a three-game series in Cleveland.
Boston earned its latest title on the 16th anniversary of hoisting its last Larry O’Brien Trophy in 2008.
Seattle’s 8 1/2-game lead in the AL West is its largest since 2001.
The tribe is limited to 25 Eastern North Pacific gray whales over 10 years.
Emerson Hancock made a spot start to give the rest of Seattle’s rotation an extra day of rest.
Seattle won its 16th one-run game, the most in the major leagues.
Inslee says the number of women coming to Washington from out of state for abortions has jumped by 50% since Roe v. Wade was overturned.