49ers tight end George Kittle's groin injury not good, contingency plans in place for him should he be ruled out for first game against Bears: One source characterized injury as serious enough
49ers' Jimmy Garoppolo 'can't force things' to George Kittle despite past
George Kittle injury update: 49ers tight end 'unlikely' to play Week 1
George Kittle - San Francisco Chronicle
49ers injury news: George Kittle has a Grade 2 groin strain that's limiting his top-end speed; misses practice Thursday - Niners Nation
49ers' George Kittle battles groin injury, leads offense vs. Rams
49ers inactives: George Kittle officially out
49ers Rumors: George Kittle's Groin Injury 'Not Good'; Unlikely for Week 1 vs. Bears, News, Scores, Highlights, Stats, and Rumors
If I'm not doing football, I'm doing recovery”- George Kittle gets candid on NFL players' health scare as Thursday Night Fixture debates galore
Sources: 49ers tight end George Kittle's groin injury 'not good'
NFL Week 1 injury report: Mark Andrews not expected to play, Jordan Love without a top target
George Kittle injury update: How to handle the 49ers TE vs. Steelers in Week 1 - DraftKings Network
San Francisco 49ers' George Kittle misses practice because of groin injury - ESPN