Players who are eligible for the injured reservet (IR) are designated with an asterisk and an "IR" in red. To move a player on your team to an IR slot click on the "Manage IR" link at the top of your team page. This link will only appear in leagues which use IR slot(s).
IR-eligible players can only be moved to the IR slot from your active roster or bench. Players can not be added directly to your IR slot from free agency, as you must first add the player to an open bench slot.
To move a player from your IR back to your active roster or bench, click on the "Manage IR" link at the top of the Team page and activate the player.
NOTE: Once a player is off the IR (no longer IR eligible), the player must be placed back on the team roster before the team owner can complete another player related transaction (add, drop, etc).