After the Giants’ GM Brian Sabean gave his concerns to MLB on the use of the humidor in Coors Field, its use has changed:
The new procedure, which took effect Saturday and will remain for the rest of the season, is as follows: An umpire will carry the balls out of the humidor. After the balls are placed in the Rockies’ dugout, they must remain in the umpires’ view during the game.
The fundamental change in the process is the umpires’ direct involvement. During the first eight-plus years of the humidor’s use, the Rockies had a team employee handle the baseballs with no supervision.
There is no evidence that the Rockies have ever cheated with the humidor.