Major League Baseball informed all 30 teams Friday that players selected in the amateur draft will be permitted to be traded beginning the day after the conclusion of the World Series.

The rule change will become effective following next month's First-Year Player Draft.

The previous rule prohibited teams from trading players until one year after they were drafted.

However, because the rules regarding players to be named later stated that teams had six months to determine the player in question, a loophole had been exploited in which prospects from the most recent draft were simply included as a players to be named later in trades that occurred more than six months after the draft in which they were selected.