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Some team sports put players on different official lists according to circumstances for that player, for example if they are injured. There can be different rules for players on different lists, and the details vary between sports.
In Major League Baseball (MLB), the injured list (IL) is a method for teams to remove their injured players from the roster in order to summon healthy players. Before the 2019 season, it was known as the disabled list (DL).
A Major League Baseball roster is a list of players who are allowed, by league agreement, to play for a Major League Baseball (MLB) team. Each MLB team maintains two rosters: an active roster of players eligible to participate in an MLB game, and an expanded roster encompassing the active roster plus additional reserve players.
Major League Baseball transactions are changes made to the roster of a major league team during or after the season. They may include waiving, releasing, and trading players, as well as assigning players to minor league teams.
In sports, the practice squad, also called the taxi squad or practice roster, is a group of players signed by a team but not part of their main roster. Frequently used in gridiron football, they serve as extra players during the team's practices, often as part of the scout team by emulating an upcoming opponent's play style. Because the players on the practice squad are familiar with the team's plays and formations, the practice squad serves as a way to develop inexperienced players for promotion to the main roster. This is particularly important for professional gridiron football teams, which do not have formal minor league farm team affiliates to train players. In addition, it provides replacement players for the main roster when players are needed as the result of injuries or other roster moves, such as bereavement leave.
The injured reserve list is a designation used in North American professional sports leagues for athletes who become injured and temporarily unable to play. The exact name of the list varies by league; it is known as "injured reserve" in the National Football League (NFL) and National Hockey League (NHL), the "injured list" in the Canadian Football League (CFL), and the injured list in Major League Baseball (MLB). The National Basketball Association (NBA) does not have a direct analog to an injured reserve list, instead using a more general-purpose "inactive list" that does not require a player to be injured.
The Official Professional Baseball Rules Book governs all aspects of the game of Major League Baseball beyond what happens on the field of play. There are a number of sources for these rules, but they all ultimately are sanctioned by the Office of the Commissioner of Baseball. Examples of these rules are the Rule 5 draft and the injured list. Other examples include:
Listed below are each of the active sports leagues in Minor League Baseball, with linked articles containing rosters for each active team in the league.
The NBA Collective Bargaining Agreement (CBA) is a contract between the National Basketball Association and the National Basketball Players Association, the players' union, that dictates the rules of player contracts, trades, revenue distribution, the NBA Draft, and the salary cap, among other things. In June 2005, the NBA's 1999 CBA expired, meaning the League and the players' union had to negotiate a new agreement; in light of the 2004–05 NHL lockout, the two sides quickly came to an agreement, and ratified a new CBA in July 2005. This agreement expired following the 2010–11 season, leading to the 2011 NBA lockout. A new CBA was ratified in December 2011, ending the lockout.
Non-football injury and non-football illness (NFI) are roster designations used in the National Football League (NFL) for players who are unable to practice as a result of conditions unrelated to football, or injuries that did not occur during NFL games or practices. They are similar to the physically unable to perform and injured reserve lists.
