Walker went 2-for-3 with a solo home run, two walks and two additional runs scored in Sunday's 9-0 win over the A's.
Walker extended Houston's lead to 5-0 in the sixth inning with a solo shot off Scott Blewett, his 29th homer this year. Walker will head into the postseason on a hot streak, going 8-for-23 (.348) with four homers in his last six games. Overall, Walker slashed .226/.299/.427 across 635 regular-season plate appearances with 87 RBI and 73 runs scored.