NFL teams never stop tinkering. While the vast majority of player movement comes during free agency and the draft, there are always going to be players who make an impact despite being acquired after the draft is completed. Heck, the Ravens built half of their 2023 defense out of players they added last summer, with Jadeveon Clowney, Kyle Van Noy, Ronald Darby and Arthur Maulet all playing meaningful roles during their run to the top playoff seed in the AFC.
The date of June 1 also plays an important role in NFL circles.