It's that time of the year in the National Football League, when the discussion around NFL teams often times has as much to do with math as it does with sports.
That's because the start of free agency and the 2013 NFL draft are right around the corner. That means that teams have to scramble to make sure they are in compliance with this year's salary cap, which is estimated to be in the range of $121 million for 2013.
For some teams, like the Super Bowl champion Baltimore Ravens, the problem isn't cap space. The Ravens have that, but they also have a bevy of prominent free agents including quarterback Joe Flacco.
That space could get eaten up pretty quickly.
Here's a look at those teams, where they sit against the cap and the steps they've both taken and may be forced to take to get into the black before free agency begins.