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When the new NFL league year begins on March 14 at 4 p.m. ET, we're likely to see a lot of player movement and a record amount of spending.

The salary cap continues to grow on a yearly basis, and teams are carrying an average of more than $32 million into free agency.

But just because many teams have a lot of money available, they don't need to spend it carelessly. One or two high-priced veterans can certainly help put a team over the top, but looking for bargains on the open market can also help improve a roster without breaking the bank.

For a team looking at a long-term rebuild or staring down a smaller amount of cap space, the frugal approach is better.

Fortunately, there are going to be plenty of bargain free agents available. They aren't going to be the guys grabbing headlines at the start, but they may well be the best additions.

We're here to examine the biggest potential bargains of 2018 unrestricted free agency.