Mercer Island shuts out Sammamish | Prep baseball results The Mercer Island baseball team earned another KingCo win on Tuesday evening, beating Sammamish 3-0. By Megan Managan • April 18, 2012 3:02 pm The Mercer Island baseball team earned another KingCo win on Tuesday evening, beating Sammamish 3-0. The Islanders will take on Juanita at 6 p.m. tonight at Island Crest Park.