Certificate entitles the holder to Two (2) Plaza Outfield Vouchers to a 2013 regular season A's home game. Form must be returned by June 2013. Expires August 30, 2013. Vouchers may be redeemed for an Oakland A's 2013 regular season home game except for games on special event nights, opening night, and firework nights, games against the Bost Red Sox, Chicago Cubs, New York Yankees, San Francisco Giants, and St. Louis Cardinals, and all home games played in September and October.