Everyone is talking about Tom Brady, Jadeveon Clowney, and Byron Jones heading into NFL free agency, but the underrated signings are sometimes just as important.

Some guys are going to be signed that not many people talk about, and that could be the difference in teams making the playoffs or being one of the first picks in the 2021 NFL Draft.

Let's break down five underrated free agents to watch heading into free agency.

5. Marcus Mariota

Marcus Mariota is a big name, but he is underrated in terms of free agents this offseason. All the talk is about Phillip Rivers and Tom Brady, but the better long-term option very well could be Mariota.

There is no doubt he was a disappointment with the Tennessee Titans, but maybe a change in scenery is all he needs.

He could potentially be a great fit with the Chicago Bears with Matt Nagy calling the plays.

4. Devin Funchess

Devin Funchess broke his collarbone during Week 1 for the Indianapolis Colts, which was a big disappointment.

Funchess probably isn't a number one receiver on many teams, but this is a guy who can come in a be a true number two.

This is a guy who will come in and quietly be an impact player for whatever team brings him in in NFL free agency.

3. Mackensie Alexander

Mackensie Alexander was often overshadowed by Xavier Rhodes and Trae Waynes, but there could be an argument made that he was the Minnesota Vikings' best cornerback during the 2019 season.

He mostly covered the slot and did it at a high level. Pro Football Focus gave him a ranking of 65.7 for the last season.

Alexander should be highly sought after during free agency if the Vikings can't agree to a long term deal.

2. Tyler Eifert

When Tyler Eifert is on the field he is a solid tight end, but the biggest issue is keeping him on the field.

He has dealt with all kinds of injuries during his career, but in 2019, he appeared in all 16 games. He caught 43 passes for 436 yards and three touchdowns.

Some team that needs a tight end is going to get a great deal by bringing in Eifert.

1. Greg Zuerlein

Greg Zuerlein is a big-name player, but he's still underrated since he's a kicker. Zuerlein wasn't as consistent during the 2019 NFL season, but he still has one of the biggest legs in all of football.

Having a kicker is ultra important, and he still has a great career ahead of him with either the Los Angeles Rams or someone else.