In baseball, the disabled list is a means for teams to remove their injured players from the roster in order to summon healthy players to temporarily replace them. There are two types of DL: the 15 day and the 60 day. Players may be put on either list and may not rejoin the team until the associated number of days has elapsed.

Sometimes a team will keep an injured player on the roster but listed as day to day meaning the medical staff is unable to determine when the player will be ready for play time and doesn't want to risk losing the player for two weeks with what might turn out to be a minor injury.

Players may be put on the DL at a date retroactive to the last day he played. This allows a team not to be penalized for listing the player as day to day until the gravity of the injury is known.