Here is today's Mariners starting lineup and pitching matchup as the team begins a long homestand and four-game set against the Athletics Pollock and Castillo photos by wolterpix_sports Muller photo by Jamie Squire #SeaUsRise #Athletics #SeattleMariners #Baseball #MLB #MarinersBaseball #SeattleBaseball #OaklandAthletics #AJPollock #LuisCastillo #KyleMuller #SeattleMarinersFans #SeattleMarinersFan #MarinersFans #MarinersFan #SodoMojo #TrueToTheBlue #TMobilePark #Seattle #Washington