Here is tonight's Mariners starting lineup and pitching matchup ahead of game one against the Nationals Hernandez and Castillo photos by Bryan_Saldana_ Williams photo by Kevin C. Cox #SeaUsRise #Natitude #SeattleMariners #Baseball #MLB #MarinersBaseball #SeattleBaseball #WashingtonNationals #TeoscarHernandez #LuisCastillo #TrevorWilliams #TmobilePark #Seattle #SeattleSports #CirclingSeattleSports