49ers shake up depth with Beal promotion and Bradley‑King, Mahoney additions on the practice squad, plus Canteen’s release as San Francisco navigates Nick Bosa’s ACL injury. The club also kicked the tires on edge rushers Titus Leo and Isaiah Thomas while veteran Yetur Gross‑Matos looks to carry a bigger load behind a committee approach.»

Beal steps up on defense and special teams as Maks Okuayinonu shifts to defense, and Bradley‑King brings a developmental pass‑rush option with preseason tape. The transaction window signals a broader, flexible strategy as SF leans on internal development and situational depth to weather the injury cloud.

The San Francisco 49ers have added cornerback Derrick Canteen to their roster, signing him to a three-year deal following an impressive tryout during rookie minicamp. Canteen, who previously played at Georgia Southern, Virginia Tech, and Cincinnati, showcased his abilities by registering 44 tackles, 5 pass breakups, and an interception in his final collegiate season. His addition marks the seventh undrafted free agent signed by the team this offseason.

As the 49ers reevaluate their cornerback depth, Canteen joins a competitive room that includes established players like Deommodore Lenoir and Renardo Green. The team's secondary faces uncertainty beyond these two, with several roster spots available. However, making the team as a late UDFA poses a significant challenge for Canteen, who also represents the second undrafted cornerback added this year.