POWER OF ATTORNEY


     The undersigned hereby authorizes and designates Harry L. Goldsmith and
Rebecca W. Ballou, and each of them, as his true and lawful agent and
attorney-in-fact to sign on his behalf any and all statements on Form 3, Form 4
and Form 5 under Section 16 of the Securities Exchange Act of 1934, as amended,
and the rules promulgated thereunder, with respect to shares of Common Stock or
other equity securities of AutoZone, Inc. held by the undersigned or with
respect to transactions in such shares or other equity securities by the
undersigned, and to file on his behalf, any and all such reports with the
Securities and Exchange Commission, the New York Stock Exchange and
AutoZone, Inc. and hereby ratifies any such action by such agent or
attorney-in-fact. This power of attorney shall become effective as of the date
indicated below and shall remain effective for so long as the undersigned shall
be an officer or director of AutoZone, Inc. unless sooner revoked by the
undersigned in writing.

                                        /s/ William C. Crowley
                                        ---------------------------------------
                                         William C. Crowley

Date: 9/5/2008