OAKLAND -- The As just announced that tonights game against the Seattle Mariners has been postponed due to wet grounds. In a somewhat bizarre scene, the As had earlier announced a delayed starting time while grounds crews worked on the infield dirt, which was apparently wet from rains overnight and during the afternoon. At the time, it had not rained steadily for about two hours. Managers from both teams conferred with umpires and O.co Coliseum staff on the field while the work was going on, but neither team came out for pre-game warm-ups. Both teams had also cancelled batting practice earlier in the afternoon. The announcement of the cancellation was met with boos from fans inside the stadium. The As announced there will be a makeup game, but the date and time of that game are to be determined.