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The Bells are entering a crucial series that could bring extra playoff baseball to Bellingham.
Bryan Woo gave up five runs and five hits in five innings while striking out eight.
Storm co-owner Celeste Keaton will miss their next five home games after an explicit interaction with two young fans.
Edwin Díaz pitched the ninth for his fifth save after coming off the injured list earlier in the day.
Emerson Hancock is on the mound tonight in what could be his final start as a Mariner.
Natisha Hiedeman sank six 3-pointers and scored a career-high 33 for Seattle.
Mariners starter Luis Castillo allowed five runs and 11 hits in five innings.
All four homers came in the first three innings off George Kirby (8-9).
Andrew Thomas had five saves for Seattle.
Andrés Muñoz struck out the side in the ninth for his 18th save in 23 chances.