Sources: 49ers tight end George Kittle's groin injury 'not good'
49ers training camp: Who will be George Kittle's tight end backups?
What happened to George Kittle? TE Grade 2 groin strain not looking good
First Call: 49ers coach addresses Nick Bosa's snap count vs. Steelers; George Kittle, other Niners return to practice
George Kittle OUT Sunday For 49ers vs. Bears? Kittle Injury 'NOT GOOD' Per Report
Is George Kittle Injured Or Healthy?
George Kittle injury update: 49ers TE uncertain for Week 1 due to groin malady
NFL rumors: George Kittle not expected to play in 49ers-Seahawks game – NBC Sports Bay Area & California
George Kittle - San Francisco Chronicle
49ers Star George Kittle Ruled Out of Practice With Concerning Injury
49ers injury news: George Kittle has a Grade 2 groin strain that's limiting his top-end speed; misses practice Thursday - Niners Nation
George Kittle injury: 49ers' TE doing 'everything' he can to play vs. Bears in Week 1
George Kittle Week 2 status for 49ers gets confusing updates
49ers' George Kittle: Groin Injury 'Significantly Better,' Aiming to Play vs. Bears : r/fantasyfootball