49ers follow up latest free-agent additions with swarm of roster moves

The San Francisco 49ers are experiencing numerous soft-tissue injuries early in training camp, particularly affecting wide receivers Jauan Jennings, Ricky Pearsall, and Jacob Cowing, leading general manager John Lynch and head coach Kyle Shanahan to frequently sign and release players on tryouts.

In response to these injuries, including one to rookie running back Jordan James, the 49ers signed running back Ameer Abdullah and wide receiver Andy Isabella on Thursday. Additionally, they signed quarterback Carter Bradley and wide receiver Marquez Callaway, while also activating offensive lineman Ben Bartch from the non-football injury list.

To create roster space for these additions, the team released wide receiver Equanimeous St. Brown, offensive lineman Sebastian Gutierrez, wide receiver Malik Knowles, and safety Jaylen Mahoney. Mahoney's release was noted as a minor surprise given his playing time last season and perceived potential as a depth safety.

These roster moves are primarily aimed at bolstering depth at various positions to ensure sufficient players are available for practices and upcoming preseason games. However, concerns remain if key injured players like Jauan Jennings are unable to return.