▁both ▁of ▁their ▁N L CS ▁appearances , ▁in ▁ 2 0 1 1 ▁against ▁the ▁St . ▁Louis ▁Card inals ▁and ▁in ▁ 2 0 1 8 ▁against ▁the ▁Los ▁Angeles ▁D od gers , ▁making ▁them ▁ 1 – 2 ▁all ▁time ▁between ▁both ▁League ▁Championship ▁Series . ▁ ▁The ▁Ast ros , ▁mean while , ▁have ▁a ▁ 3 – 4 ▁all - time ▁record ▁between ▁both ▁League ▁Championship ▁Series , ▁having ▁gone ▁ 1 – 3 ▁in ▁four ▁N L CS ▁appearances ▁( lost ▁in ▁ 1 9 8 0 ▁to ▁the ▁Philadelphia ▁Phill ies , ▁lost ▁in ▁ 1 9 8 6 ▁to ▁the ▁New ▁York ▁M ets , ▁lost ▁in ▁ 2 0 0 4 ▁to ▁the ▁Card inals , ▁and ▁won ▁in ▁ 2 0 0 5 ▁versus ▁the ▁Card inals ) ▁and ▁ 2 – 1 ▁in ▁three ▁AL CS ▁appearances ▁( win ning ▁in ▁ 2 0 1 7 ▁and ▁ 2 0 1 9 ▁against ▁the ▁New ▁York ▁Yan ke es ▁and ▁losing ▁to ▁the ▁Boston ▁Red ▁So x ▁in ▁ 2 0 1 8 ). ▁ ▁The ▁Ast ros ▁are ▁the ▁only ▁team ▁in ▁ML B ▁to ▁appear ▁in ▁the ▁World ▁Series ▁as ▁a ▁member ▁of ▁both ▁the ▁National ▁League ▁( 2 0 0 5 ) ▁and ▁the ▁American ▁League ▁( 2 0 1 7 ▁and ▁ 2 0 1 9 ); ▁they ▁have ▁gone ▁ 1 - 2 ▁overall ▁across ▁three ▁World ▁Series ▁appearances , ▁going ▁ 0 - 1 ▁as