What happened: George Kittle has an Achilles injury, Isaac Guerendo a pectoral injury and Mykel Williams an ACL injury. Cincinnati placed B.J. Hill on active/PUP and Josh Kattus on active/NFI. Paris Johnson Jr. was activated from PUP.
Why it matters: The designations determine who can participate as training camps open. Johnson's activation clears him to resume practice, while the other moves delay camp work during rehabilitation.
By the numbers: Six named players were involved: three 49ers with specified injuries, two Bengals placed on injury lists and one player activated from PUP.
What to watch: Camp participation will provide the next availability marker. The 49ers' corresponding roster designations also bear watching.