Toney was reinstated to the NFL last week after serving a yearlong suspension for gambling.
Johnson is pinned as a potential third-round selection in the 2024 NFL Draft.
Potts spent five years as a backup in college.
Toney was previously indefinite suspended after placing bets on NFL games.
Daequan Hardy is undersized by NFL standards, but his athleticism and versatility could mask those doubts as the NFL Draft nears.
Brown was a sixth round pick in the 2020 NFL Draft.