49ers live updates: Niners face Chiefs in Super Bowl rematch

The 49ers face their biggest test of the young season on Sunday when they host the undefeated Kansas City Chiefs, who they last saw in February at the Super Bowl.

The Chiefs, led by superstar Patrick Mahomes, crushed the 49ers’ championship dreams in overtime that night in Las Vegas with a 25-22 victory.

The Niners enter the game with a few extra days of rest and a number of players seeking to get healthy after last week’s Thursday night win in Seattle. Jordan Mason (shoulder) and...