For the second time since September, the commissioner's office has modified how baseballs are removed from the Coors Field humidor and monitored during games. All 30 teams received a memo regarding the new procedures. An authenticator employed by MLB meets the umpire-room attendant at the humidor before the game, watching as the baseballs are removed. The authenticator follows the attendant to the umpire's room, where the baseballs are rubbed down. He then accompanies the attendant as the baseballs are placed in Colorado's dugout. During the game, the authenticator sits with the ball bag in sight. Because the authenticator cannot leave his post, an MLB-contracted security officer meets the umpire-room attendant at the humidor if more baseballs are required during the course of the game. "The Rockies could not have been more cooperative about this," Joe Garagiola Jr., MLB's senior vice president of standards and on-field operations.