Commissioner Setting IR Slots: How to Use Injured Reserve Spots in Your League
Why IR slots are a small setting with real consequences: injured reserve (IR) slots let managers stash injured players in a separate spot without using a regular roster spot, so a manager who loses a star to injury can hold him for his return instead of cutting him or clogging the bench. IR slots soften the brutality of injuries and reward managers for holding onto hurt stars, which most leagues find fair and fun. But the setting cuts both ways: if IR eligibility is loose, managers can exploit it to effectively expand their roster — stashing questionable or barely-injured players to gain extra space. How many IR slots to allow, and what eligibility rules govern them, is a setup decision that balances injury relief against roster-expansion abuse. Understanding how IR slots work helps you set them up to help managers without creating a loophole.
Setting IR Slots
What IR slots do:
The function: (1) they stash injured players off the active roster — an IR slot holds an injured player without occupying a regular roster spot, so a manager can keep a hurt star for his return; (2) they soften injury brutality — IR slots reward managers for holding injured players instead of forcing a cut, which makes the harsh luck of injuries less punishing (relevant in shallower roster sizes where injuries bite hardest); (3) they reward foresight, not just luck — managing the IR (stashing the right players, activating them on return) becomes a small skill that good managers use; (4) they interact with roster size, since IR slots effectively add conditional roster space, so they are part of the overall roster settings picture.
The trade-offs of how many to allow:
Sizing it: (1) more IR slots help with injuries but expand rosters — generous IR space means managers rarely have to cut injured stars, but it also enlarges effective roster size and can quiet the waiver wire; (2) too few IR slots make injuries punishing — minimal IR space forces managers to cut hurt players, which is harsh, especially in deeper or dynasty formats where holding injured assets matters; (3) format shapes the right number — dynasty and keeper leagues often want more IR space (to hold injured long-term assets), while redraft can run leaner; (4) balance relief against abuse, since the goal is enough IR space to fairly handle injuries without turning IR into a free roster-expansion tool.
The eligibility rules and how to set IR up fairly:
Preventing abuse: (1) define strict IR eligibility — limit IR slots to players with a genuine injury designation (e.g., officially Out or on NFL IR), not merely Questionable, so managers cannot stash healthy-ish players for extra space; (2) require active-roster compliance — enforce that a player must be moved off IR (and the roster made legal) before he can be started, and that ineligible players cannot sit on IR, which the platform often automates; (3) set clear activation rules — define what happens when an IR player is healthy (he must be activated or dropped within a reasonable window), preventing indefinite stashing of recovered players; (4) put the IR rules in the league rules, since the slot count and eligibility belong in your league setup so the IR system is understood and applied consistently, the fair structure a good commissioner defines up front.
For the broader roster and setup framework, see our roster size guide and commissioner tips hub. Start at the commissioner hub for all resources.