Every year NFL teams get to carry over unused salary cap from the previous season and bring it to the new year.
There is no limitation on how many years you can roll over unused salary cap, so the best way is to think of it is like rollover minutes on your cellphone.
According to the NFL Players Association, the league's 32 teams didn't use nearly $294 million in cap space last season.
Some teams were more frugal than others when it came to offseason spending, but they'll have a chance to close the gap this offseason.