Darby (undisclosed) was waived/injured by the 49ers on Monday, Matt Maiocco of NBC Sports Bay Area reports.
The move makes room on the training camp roster for wide receiver Robbie Chosen. Darby signed with the 49ers in July after spending most of the 2023 season on the Falcons' practice squad. It's unclear what is ailing Darby, but if the 2021 sixth-round pick were to clear waivers, he would revert to San Francisco's injured reserve and be forced to miss the entire 2024 season unless an injury settlement is reached.