Bosa doubtful, Williams out for 49ers’ Sunday game vs. Bears

Defensive end Nick Bosa's physical condition has improved but it still is not expected to be enough for him to suit up for the 49ers on Sunday against the Chicago Bears. "He did a little bit more," Shanahan said of Bosa. The 49ers left the door slightly ajar for Bosa to return to action Sunday. He is listed as doubtful to face the Bears at Levi's Stadium due to injuries to the hip and oblique muscles on both sides. Bosa likely will miss his third consecutive game. All-Pro left tackle Trent Williams was ruled out of action for the third week in a row with an ankle injury. Running back Jordan Mason, linebacker Dre Greenlaw and safety George Odum also were ruled out for Sunday's game. Greenlaw remains on the physically-unable-to-perform list and likely will be activated for the 49ers' Week 15 game on Thursday against the Los Angeles Rams. The 49ers listed left guard Aaron Banks as questionable. Banks still has steps to take in the NFL's return-to-play concussion protocol in order to be cleared to play in Sunday's game, Shanahan said. Safety Talanoa Hufanga is also listed as questionable. The 49ers opened the practice window for him this week as he remains on injured reserve with a...