FantasyPros has put out its 2026 UDFA Signing Tracker and Fantasy Football Outlook, turning the spotlight to undrafted free agents after the 2026 NFL Draft. The big name in the group is Rivers, who dropped out of the draft and then signed a UDFA deal with the Buccaneers.
Rivers is the kind of receiver fantasy managers chase late. In 2025, he lined up out wide on 72.7% of his snaps and got 22.7% of his target volume on deep throws, a profile built on elite speed and field-stretching play. FantasyPros said it would draft him with a final rookie pick in the last round, or pick him up off waivers and stash him on a taxi squad. The site added that it is a believer in his talent and would not be shocked if he became this year's Jalen Coker.
The Buccaneers are getting a true perimeter wide receiver, not a gadget player. That matters in fantasy because UDFA receivers rarely get long runway, and Rivers' deep-ball usage gives him a clearer path to a role than many players who sign after the draft. For dynasty managers, the appeal is simple: a cheap shot at speed, a depth chart opening and a player the scouting community was already willing to keep on a watch list before the draft ended. A profile like that is the same reason some viewers free up time for a streaming debut of Tom Hardy's Warrior or keep an eye on a bogey-free 66 from Lexi Thompson — the value is in catching the right moment early.
Caldwell and Montgomery round out the tracker as the other names with traits fantasy players know to notice. Caldwell is 6'5" and 215 lbs., ran a 4.31 40-yard dash and posted a 37.9% contested catch rate over the last two years, but he also had a 10.1% drop rate in college. Last year, 27.6% of his target volume came via deep targets, which fits the same downfield mold that can matter in a free fantasy dart throw. Montgomery offers a different look: he secured 61.5% of his 13 contested targets last year, while his raw speed is described as adequate and more of the build-up variety.
The tension in any UDFA list is that promising traits do not always survive contact with an NFL roster. Rivers may have the clearest fantasy case because of the Buccaneers' commitment and his speed profile, but Caldwell's ball skills and Montgomery's contested-catch production show why the tracker is not just about one player. It is about which undrafted receivers can turn a post-draft signing into something that matters before roster cuts narrow the field. For now, FantasyPros has answered the question it raised: Rivers is the best free stash, and he belongs on rookie radars, waiver lists and taxi squads right away.