Source: #49ers are placing TE George Kittle on injured reserve due to his calf injury.

Kittle must miss three games. The team believes he would be dealing with the condition all season if he continued to try to play. There’s a good chance he’ll be back Nov. 7 to face Cardinals.

— Matt Maiocco (Threads @maiocconbcs) (@MaioccoNBCS) October 9, 2021