°The size of the active roster expands from 25 players to 26 players, through August 31.
- The size of the expanded roster in September is reduced from 40 players to 28 players.
- Only players designated as pitchers will be allowed to pitch in any regular-season or postseason game, with limited exceptions (such as one team leading by at least seven runs, or the game going into extra innings).
- Once a player has pitched at least 20 innings and made at least three plate appearances as a position player or designated hitter in each of 20 games, he earns the status of "two-way player" for the remainder of the season plus all of the next season. Players with this status may pitch at any time during a game.





















