Which teams should pursue them? We asked ESPN NFL writers Matt Bowen, Jeremy Fowler and Field Yates to pick the best team fits for the top 18 players who are still unsigned.
Here's where they think each player should sign, starting with quarterbacks and ending with a safety (ages for each player are from when the 2020 season begins):
Cam Newton, QB
2019 team: Panthers | Age: 31
The former No. 1 overall pick, who was released by Carolina in March, made just two starts in 2019. He's still rehabbing from surgery in December on his foot.
Matt Bowen, NFL analyst: Rams. If Newton takes on a backup role this season, landing with the Rams is a great spot for him. He would add depth and talent to the quarterback room behind starter Jared Goff, and Sean McVay's play-action route tree would cater to Newton as a thrower.
Jeremy Fowler, national NFL writer: Seahawks. The Seahawks would be open to adding Newton -- they get more creative with the free-agent market than most -- but wouldn't pay much for a backup quarterback. Maybe that doesn't matter to Newton, who can prioritize fit over contract as he attempts to reignite his career. He would fit seamlessly in Seattle's offense, and starting jobs simply aren't available.
Field Yates, NFL analyst: Seahawks. If Newton were to consider going the Andy Dalton/Jameis Winston route, Seattle would make a lot of sense. The depth after Russell Wilson is led by undrafted rookie Anthony Gordon, so while Seattle has never had to worry about life without Russ since he entered the league -- Wilson hasn't missed a game -- Newton would provide invaluable insurance. Seattle is a franchise that perpetually preaches the importance of competing; it's a place in which, I believe, Cam would see value on a one-year basis.
Joe Flacco, QB
2019 team: Broncos | Age: 35
Flacco made eight starts for Denver last season, throwing six touchdown passes and five interceptions while completing 65.3% of his passes. He went on injured reserve in November with a herniated disk in his neck, but he had surgery in April and is expected to be ready for the season.