Injured reserve (IR) is a designation professional sports teams use to temporarily sideline a player who is too hurt to compete, removing them from the active roster while they recover. The term comes up most often in the NFL, where it carries specific rules about how long a player must sit out, how the team can replace them, and when (or if) the player can return to action during the same season.
How Injured Reserve Works in the NFL
The official name is the reserve/injured list, but everyone calls it IR. When an NFL player suffers a football-related injury that will keep them out for at least a few weeks, the team can place them on injured reserve. The player immediately stops counting against the 53-man active roster, freeing up a spot for a healthy replacement. Their salary, however, still counts against the team’s salary cap. Players continue to get paid while on IR.
A player placed on IR must sit out a minimum of four games before becoming eligible to return. That four-game minimum was updated in recent years; previously the requirement was three games. Before 2012, being placed on IR essentially ended a player’s season entirely, with almost no path back to the field. Today’s rules give teams much more flexibility to use IR as a short-term healing period rather than a season-ending move.
The Return Process
When a team believes an IR player is close to ready, it can open a 21-day practice window by designating that player for return. During this window, the player can participate in team practices without being added back to the active roster. This lets coaches and medical staff evaluate whether the player is truly game-ready before committing a roster spot.
If the player looks good, the team activates them back to the 53-man roster. If not, the player stays on IR. Teams are limited to eight designated-for-return transactions during the regular season. Starting in 2025, clubs that make the postseason receive two additional designations, a rule change aimed at giving playoff teams more roster flexibility during January and February.
IR vs. the PUP List
The physically unable to perform (PUP) list is a related but distinct designation. PUP is specifically for players dealing with football-related injuries that prevent them from practicing during training camp. Players on the active PUP list can attend team meetings and be around the facility, but they cannot practice or play. The key difference: PUP is a preseason tool used before the regular season begins, while IR can be applied at any point during the season once rosters are set. A player who starts training camp on PUP and still isn’t ready by roster cutdowns can be moved to IR at that point.
How Other Leagues Handle Injuries
Baseball uses a tiered system called the injured list (IL) rather than injured reserve. Position players go on the 10-day IL, while pitchers and two-way players use the 15-day IL. For more serious injuries, any player can be placed on the 60-day IL, which is the longest designation in baseball. The 60-day IL temporarily removes a player from the team’s 40-man roster, making it a last resort. If a team doesn’t need that 40-man spot, it will often just leave a player on the shorter IL beyond 60 days rather than formally transferring them.
The NHL has its own version called long-term injured reserve (LTIR). In hockey, LTIR has historically been a salary cap management tool as much as a medical one. Teams could place injured players on LTIR during the regular season, freeing up cap space to add other players. In past years, those replacement players could then be dressed for playoff games even if the team technically exceeded the salary cap. The NHL has since moved to close that loophole by requiring teams to stay cap-compliant during the postseason.
Why Teams Use IR Strategically
IR isn’t purely a medical decision. Because it frees a roster spot, teams sometimes face a tactical choice: place a player with a moderate injury on IR (guaranteeing they miss four games) or keep them on the active roster and hope they heal faster, at the cost of carrying one fewer healthy player on game day. For a team with depth at the injured player’s position, the math often favors IR. For a team already thin at that spot, losing the player for a guaranteed four games can be harder to stomach.
The salary cap dimension adds another layer. Since IR players still count against the cap, placing someone on injured reserve doesn’t create spending room the way it does in some other leagues. Teams can’t stash expensive players on IR to free up money for midseason additions. The only resource IR frees up is the roster spot itself.
Late-season IR decisions get especially interesting. If a player gets hurt in Week 15, a four-game absence likely means they’ll miss the rest of the regular season. But with the designated-for-return rules, a playoff-bound team could still bring that player back for postseason games, assuming the timeline works and the team has remaining return designations available.