Katie Ledecky became the second swimmer to win an event at four straight Summer Games, holding off Ariarne Titmus to win the 800-meter freestyle.
49ers likely without Kittle, possibly 2 top defenders
49ers tight end George Kittle is doubtful for Sunday's game at Los Angeles with a hamstring injury, while two of San Francisco's top defenders, Nick Bosa and Charvarius Ward, are listed as questionable. Read More