Yes. The NFL mandates that teams put out an injury report every week to declare who's hurt and how bad. However, when a player is seriously injured, and that injury will take a long time to heal, the team may put the player on 'injured reserve'. This is a list outside the normal roster limits, but once on the list, a player cannot rejoin the regular roster that season.
The official playing roster of an NFL team is limited to 53 players. The total including the practice squad is eighty players. Injured reserve players are counted against this total but may not play or practice for the current season.
An NFL team has 53 men on its roster not counting injured reserve.
55
The active roster for an NFL team is 53 players not including those on the injured/reserve or the practice squad.
100
The Steelers, like any other NFL team have 53 players on their active roster.
How many players can be on a NBA roster
How many players can be on a NBA roster
Yes, NFL teams typically have a backup kicker on their roster in case the starting kicker gets injured or is unable to play.
A NFL roster has 53 players. A team is also allowed to have a practice squad, a group of developmental players. The practice squad is can have as many as 8 players on it. Therefore, there are a total of 61 spots on an NFL roster. As you can see by the limited numbers of spaces available, there is a lot of competition to achieve a roster spot in the NFL.
http://www.seahawks.com/team/roster
In ESPN Fantasy Football, the Injured Reserve (IR) slot allows you to place players who are officially designated as injured, freeing up a roster spot for active players. To use the IR slot, a player must be listed as "out" or have a designated injury status by their NFL team. Once a player is moved to IR, you can add another player to your roster without exceeding the league's roster limit. However, you cannot place a player in the IR slot if they are not officially marked as injured by their team.