) ▁of ▁Card inals ▁runs . ▁ ▁Final ▁season ▁( 2 0 0 5 ) ▁Walker ▁also ▁contributed ▁to ▁the ▁ 2 0 0 5 ▁N L ▁Central ▁division ▁champions , ▁w inners ▁of ▁ 1 0 0 ▁games . ▁A ▁h erni ated ▁disc ▁in ▁his ▁neck ▁prevent ed ▁him ▁from ▁turning ▁his ▁head ▁to ▁the ▁left , ▁and ▁on ▁June ▁ 2 7 , ▁ 2 0 0 5 , ▁he ▁received ▁a ▁second ▁cort is one ▁shot ▁to ▁alle vi ate ▁the ▁pain . ▁With ▁eight ▁previous ▁sur ger ies ▁and ▁now ▁playing ▁in ▁pain ▁that ▁imp eded ▁his ▁ability ▁to ▁continue ▁to ▁produce ▁at ▁a ▁high ▁level , ▁Walker ▁sign aled ▁that ▁he ▁would ▁ret ire ▁from ▁playing ▁after ▁the ▁season . ▁He ▁had ▁$ 1 2 ▁million ▁team ▁option ▁for ▁ 2 0 0 6 . ▁ ▁In ▁ 1 0 0 ▁regular ▁season ▁games , ▁Walker ▁batt ed ▁. 2 8 9 /. 3 8 4 /. 5 0 2 , ▁good ▁for ▁a ▁ 1 3 0 ▁OP S + . ▁His ▁play off ▁effort ▁yield ed ▁much ▁less ▁success ▁than ▁the ▁year ▁prior , ▁combining ▁to ▁collect ▁three ▁hits ▁in ▁ 2 8 ▁at ▁b ats ▁in ▁two ▁r ounds . ▁The ▁Ast ros ▁defeated ▁the ▁Card inals ▁in ▁the ▁N L CS ▁in ▁the ▁last ▁game ▁ever ▁played ▁at ▁Bus ch ▁Memorial ▁Stadium , ▁the ▁second ▁iteration ▁of ▁Bus ch ▁Stadium . ▁Walker ▁double d ▁in ▁the ▁sixth ▁in ning ▁in ▁elim ination ▁Game