FILE - In this Sept. 15, 2019, file photo, Denver Broncos wide receiver Emmanuel Sanders carries the ball against the Chicago Bears during the second half of an NFL football game in Denver. The San Francisco 49ers have raced out to six straight wins to open the season despite lacking a dynamic receiver who could change a game in a single play. So when the opportunity to acquire a player like Sanders presented itself, the Niners didn't hesitate to make a move, giving up a pair of draft picks for a 32-year-old receiver in the final year of his contract. (AP Photo/David Zalubowski, File)

San Francisco 49ers quarterback Jimmy Garoppolo, right, hands off the ball to running back Matt Breida in the second half of an NFL football game against the Washington Redskins, Sunday, Oct. 20, 2019, in Landover, Md. (AP Photo/Julio Cortez)

Carolina Panthers running back Christian McCaffrey (22) is congratulated by quarterback Kyle Allen after scoring a touchdown against the Tampa Bay Buccaneers during the first quarter of an NFL football game, Sunday, Oct. 13, 2019, at Tottenham Hotspur Stadium in London. (AP Photo/Tim Ireland)

San Francisco 49ers head coach Kyle Shanahan speaks at a news conference after an NFL football game against the Washington Redskins, Sunday, Oct. 20, 2019, in Landover, Md. (AP Photo/Alex Brandon)