According to NFL Network’s Tom Pelissero, with the challenges presented by the ongoing pandemic, the NFL has elected not to conduct a supplemental draft this year—which last year occurred in early July:
Under the CBA, the NFL may elect to hold a supplemental draft each year. The matter was discussed with the NFL Management Council Executive Committee, and in light of current conditions, the decision was made not to hold one.— Tom Pelissero (@TomPelissero) July 1, 2020
The supplemental draft ordinarily allows college prospects who are eligible (ordinarily because of academic ineligibility or prior college team dismissal for the upcoming season) but did not enter the spring’s NFL Draft to be potentially selected.
An NFL team who selects a supplemental draft prospect must forfeit the corresponding draft pick in the following spring’s NFL Draft.
Would-be prospective 2020 supplemental draftees will not be free agents; however, as they will be able to enter the 2021 NFL Draft instead.
For what it’s worth, the Colts have historically never claimed a player in the supplemental draft, and last year, only one such player was selected by an NFL franchise.
Nevertheless, it’s one less avenue for all NFL teams to potentially acquire additional talent this summer—even if it’s infrequently utilized in the grand scheme of things.