Los Angeles Rams wide receiver Cooper Kupp jumps for a pass over San Francisco 49ers defensive back K'Waun Williams (24) during the first half of an NFL football game in Santa Clara, Calif., Thursday, Sept. 21, 2017.
Los Angeles Rams wide receiver Cooper Kupp jumps for a pass over San Francisco 49ers defensive back K'Waun Williams (24) during the first half of an NFL football game in Santa Clara, Calif., Thursday, Sept. 21, 2017. Ben Margot AP
Los Angeles Rams wide receiver Cooper Kupp jumps for a pass over San Francisco 49ers defensive back K'Waun Williams (24) during the first half of an NFL football game in Santa Clara, Calif., Thursday, Sept. 21, 2017. Ben Margot AP
On the 49ers

On the 49ers

The latest Niners news with Chris Biderman

49ers sign cornerback K’Waun Williams through 2020

September 29, 2017 08:40 AM