49ers place four players, including three starters, on PUP list

The San Francisco 49ers have placed four players, including tight end George Kittle, on the physically unable to perform list as training camp begins. Kittle continues his recovery from an Achilles tear, while defensive end Mykel Williams is healing from a previous ACL injury. Defensive tackle Alfred Collins is managing a shoulder injury, expected to return during camp. Running back Isaac Guerendo faces challenges after an offseason pectoral tear, impacting his chances for a roster spot as he competes behind draft picks in the team's depth chart.

• 8:03 PMYahoo Sports — 3 key starters among 4 placed on PUP list by 49ers to start camp