Disabled List: Any player placed on the disabled list must sit out for at least seven games. The first day on the disabled list is the day after the player's last game.

Designated Hitter: A hitter my be designated to bat for he pitcher in any spot in the batting order in any game without affecting the status of the pitcher. The DH must be selected and be included on the lineup cards presented to the umpires prior to the game. The DH is locked into the batting order, but may be removed for a pinch-hitter or pinch-runner, who in turn immediately becomes the DH. While still in the game, the DH may be used defensively, but the pitcher must assume the batting of the replaced defensive player, thus terminating the DH role.

Pinch Hitter: A player shall be considered a pinch hitter only if he enters the game as a substitute batter, and then only on his first time at bat, which must be before he becomes a fielder.

Regulation Game: A regulation game consists of nine innings, unless extended because of a tie score, or shortened (1) because the home team needs none of its half of the ninth or only a fraction of it, or (2) because the umpire calls the game.
EXCEPTION: A double-header consists of two seven inning games, in which the rules applied for the ninth inning are applied to the seventh inning. If a game is called, it is a regulation game:
    1- If five innings have been completed.
    2- If the home team has scored more runs in four or four and a fraction half-innings than the visiting team has scored in five completed half-innings.
    3- If the home team scores one or more runs in its half of the fifth inning to tie the score. If each team has the same number of runs when the game ends, the umpire shall declare it a "tie game." If a game is called before it becomes a regulation game, the umpire shall declare it "no game."

Expansion Drafts: When a new team joins the league, the existing teams must protect a given number of players from their end-of-season roster (active and disabled). The new teams will draft The Atlantic League negotiating rights to a selected number of players from the existing teams' rosters. No team can lose more than two players.

Open Tryouts: The Atlantic League holds a league wide open tryout in Florida every winter. Each team in the league has the option to hold open tryouts for the ballplayers to attempt to make the team. Participants must be at least 18 years of age and have prior baseball experience for tryout for the team. Players signed by the open tryout are invited to spring training, but not guaranteed a place on the teams' roster.

PLAYOFFS

The Atlantic League plays a split season format in which the first half and second half winners of each division will play in a best-of-five Divisional Series, with winners advancing to a best-of-five Atlantic League Championship Series. If two teams in one division tie for the Second Half Championship (one of whom is the first half winner), then the other shall be declared the Second Half Champion and will play the first half winner for the Division Championship.

In the event a club should win both halves of their division, their opponent for the best-of-five divisional playoff shall be the club, regardless of division, designated as the WILD CARD, that has achieved the best overall record for the entire season.

Double Wild Card

In the event the same clubs win both halves of their respective divisions there are two scenarios: