The San Francisco 49ers activated wide receiver Kyle Williams and linebacker Darius Fleming while placing wide receiver Michael Crabtree on the physically unable to perform (PUP) list to open training camp.
Defensive tackle Lamar Divens was placed on the Active/Non-Football Injury list.
Players on the PUP list can be activated at any time.
Crabtree is recovering from a torn Achilles' tendon suffered during the offseason, and is expected to open the regular season on the PUP list as well.
Williams had surgery in December to repair a torn ACL in his knee.