NEW YORK, NY (WTVB) - All 30 Major League teams have unanimously approved the expansion of instant replay which will be in effect for this year’s regular season and postseason. Under the new system, managers will start each game with one challenge. If correct on the first challenge, they would receive a second. No manager may challenge more than two plays in a game. Once the manager has exhausted his ability to challenge plays during the game and after the beginning of the seventh inning, the crew chief may choose to invoke instant replay on any reviewable call. For the first time, calls at first base, at the plate, and on the bases can be reviewed along with hit batters. Home run and other boundary calls will remain reviewable under the procedures in place last season.