Some players step onto the field and drip star status. They are confident of their future in the NFL. Other players, however, don't get the recognition they deserve.The best teams try to fill their franchise with all top players, but sometimes even great players get outshined by the unknown ones. These players work well under the radar and deserve more recognition.Here are the top five underrated free agents in the NFL.#5 Will FullerHouston Texans v Detroit LionsThe wide receiver, Will Fuller came into the 2020 season with high hopes.Fuller played in 18 combined games from 2018-19, and had brilliant chemistry with QB Deshaun Watson. They connected for 879 receiving yards and eight touchdowns on 53 catches.The wide receiver was averaging a career-high of 79.9 yards per game.However, everything went downhill for Fuller after he was suspended for six games.There are many great wide receivers available for the off-season. But Fuller can rebuild his image if given the opportunity of just a one-year deal.Speed. Nothing but speed. Will Fuller V!!!📺: CBS📱: https://t.co/y6GlR8cwaP pic.twitter.com/dhXTDPq6sv— Houston Texans (@HoustonTexans) November 26, 2020#4 John Johnson IIISafety John Johnson was an underrated player in a star team. The Los Angeles Chargers had a star-studded defense this past season.Aaron Donald and Jalen Ramsey are among the best players in the league, and Johnson played an underappreciated role in the team's dominance.The versatile player has 29 stops and eight pass deflections. He is also excellent against the run and at dropping back coverage.John Johnson III: PFF's highest-graded NFC safety (86.7)#ProBowl | #ProBowlSnub pic.twitter.com/YqQ252yjAX— PFF (@PFF) December 22, 2020#3 Shelby HarrisDenver Broncos v New York JetsShelby Harris was ranked No. 6 for interior pass rushers for PFF. The defensive tackle had eight hits, three sacks, and 16 QB hurries.Harris is vital in stopping passing attacks. The 290-pound defensive tackle is also versatile against the run.The Denver Broncos brought Harris back for a one-year deal. Even though injuries affected many starters, Harris stayed fit and continued performing for the side.#Broncos underrated DL Shelby Harris (28:00) is going to get paid in FA. He told RapSheet + Friends he signed with @RosenhausSports & would like to return to Denver. "We LOVE Denver. But I’m 28. We got 1 shot at this. This is for my kids & my kids' kids.” https://t.co/0iWxG3RATf— Ian Rapoport (@RapSheet) January 31, 2020#2 Jared CookJared Cook's only downside seems to be his age. The 33-year-old tight end registered back-to-back pro bowls, the first two of his career, after having produced one of his best statistical performances ever.Cook has played for five different teams. He has been outstanding for all of them, except an injury-affected season with Green Bay.Cook has had five 600 yard seasons, nine touchdowns in 2019 and has proven himself a lethal player.Jared Cook what a catch 👀 pic.twitter.com/RFhRICTkYf— PFF (@PFF) October 25, 2020#1 Jameis WinstonNew Orleans Saints v Carolina PanthersWhen quarterback Jamies Winston holds the ball, fans hold their breath. Winston can either throw tremendously or disappoint fans with a weak throw.It's undeniable that the quarterback has excellent potential. Winston is rarely stationary in the pocket and can still extend a play as good as some of the league's faster quarterbacks.Winston is exceptional at throwing on the run. He can stagger and send a linebacker flying to throw to the first down.Winston ended his 2019 season 9th overall in QB rushing yards with 250 yards and a TD on 59 carries for 4.2 yards a carry.