The injured list or IL, formerly known as the disabled list, is the place where teams inscribe a player's name when he is unavailable for a lengthy period of the season due to an injury. This allows the team to replace the player on its roster with another player. When a player is on the injured list, he cannot be used in a game, although he can stay with his team. He can even sit in uniform in the team's dugout with permission from the League. If the injured player is ready to return to action before the season ends while the team's roster is full, another player's name must be removed from the active roster to make room or the player coming off the IL must be waived (see waivers). Major League players are paid their full salary while they are on the IL.
Injured lists are usually referred to by the minimum number of days players must be inactive. There are currently three types of injured lists in Major League Baseball. The more commonly used injured list is the 10-day injured list. A player on the 10-day injured list continues to occupy a spot on the Major League roster (i.e. the 40-man roster) but not on the active roster (i.e. the 26-man roster that limits teams till September 1st). Players must remain away from action for at least that number of days while they recover from whatever injury is preventing them from playing; they can however stay on the list indefinitely until they heal or the season ends. An injured player cannot be removed from the 25-man roster by being sent to the minors - his team must place him on the IL until he is healthy or the season ends. While they are on the injured list, players may be sent, with their permission, on a rehabilitation assignment in the minor leagues. The length of these assignments is limited to a week or so, and players continue to be paid a Major League salary while they are on a rehabilitation assignment. The standard injured list was 21 days until 1990, and 15 days until 2017, when the minimum length of time spent on the list was reduced in order to give teams additional flexibility.
The second type of injured list is the 60-day injured list. A player on this list can be replaced both on the active roster and the Major League roster during the regular season and post-season. However, he must return to the Major League roster during the off-season if his team wants to retain his services for the future. This is used for more serious injuries that require many weeks of healing. Some players who are in fact retired are put on the 60-day injured list for insurance purposes; this was the case of Albert Belle, who spent two full seasons on the Baltimore Orioles injured list after announcing his retirement in spring training 2001 because of a degenerative hip injury. This move allowed the Orioles to claim reimbursement for a portion of Belle's guaranteed salary from an insurance company, but it also meant that they had to put Belle's name back on the Major League roster after the 2001 and 2002 seasons, thus losing a spot for an actual player.
The third and newest type of injured list is the 7-day injured list. This injured list, also known as the concussion list, is specially made for players who have suffered concussions. Each team must designate a specialist in mild brain trauma to evaluate players and then send reports to MLB's medical director for approval before placing a player on this IL.
A player's name can be put on the injured list retroactively, dating back to the last day in which he took part in a game, but limited to five days. This is often used in the case of pulled muscles, when the healing period, which is normally only a few days, sometimes stretches longer than anticipated. It is also used when a starting pitcher must miss a start with a minor injury; this allows his team to call-up a replacement starter, and brings forward the pitcher's return date by a few days. A player already on the 10-day IL may be moved by his team to the 60-day IL to free up a space on the 40-man roster.
The Injured List was first instituted during the 1915 National League season, for a ten-day period at the time. Prior to 1990, there was a 21-day injured list as an intermediate range between ten and sixty days. That list was eliminated to make the 15-day list, introduced in 1984, the standard. Until then, the number of players who could be placed on the injured list was limited, and there was much less flexibility about when they could return to action. For example, players with Major League contracts were not allowed to go to the Minor Leagues for rehabilitation purposes in those days.
With the increased flexibility afforded teams in the use of the injured list came some unanticipated effects, namely that teams began using it creatively to increase the number of relievers available to them any given day, by shuttling pitchers regularly between the IL, the minors and the active roster. In January 2019, Major League Baseball proposed to return the minimum stay on the IL back to 15 days, and to also place greater restrictions on the length of time a player sent on option to the minor leagues must stay there before being called up again, in order to deter teams from such shenanigans and increase roster stability. That same winter, MLB announced plans to rename the list, until then called the disabled list, as the "injured list", reflecting the fact that players on it were not disabled, but simply injured. This was done at the urging of groups advocating for the truly disabled, as it helped to perpetuate misconceptions about disabled persons' ability to participate fully in society.
- Mary A. Hums et al.: "What's in a Name? Examining Reactions to Major League Baseball's Change from the Disabled List to the Injured List via Twitter", in Baseball Research Journal, SABR, Vol. 49, Nr. 2 (Fall 2020), pp. 22-32.
- Bob Nightengale: "MLB changing name of 'disabled list' to 'injured list'", USA Today, February 7, 2019.