Of course, all of the highest-priced NFL free agent signings are going to be in the spotlight to open any season. But everybody knows that it's the signings flying under the radar that end up making some of the biggest impact. We picked three free agent signings ahead of the 2026 NFL season that could end up paying off in a big way. 3 underrated NFL Free Agent signings that could pay off in 20263. Kenneth Gainwell, RB, BuccaneersContract: 2 years, $14 millionWe've seen some really strong free agent running back classes in recent years, but this was more the year of the "sleeper" than the superstar.